AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 8, 2003

                                                     REGISTRATION NO. 333-105876

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                              ----------------------

                         POST-EFFECTIVE AMENDMENT NO. 1
                                   ON FORM S-8
                                   TO FORM S-4
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                              ----------------------

                                INTERACTIVECORP
            (Exact name of Registrant as Specified in its Charter)


              DELAWARE                          59-2712887
   (State or Other Jurisdiction of           (I.R.S. Employer
   Incorporation or Organization)           Identification No.)


                              152 WEST 57TH STREET
                            NEW YORK, NEW YORK 10019
                         (Address of Principal Executive
                              Offices and Zip Code)


       AMENDED AND RESTATED 2001 STOCK INCENTIVE PLAN OF LENDINGTREE,
                                      INC.
         AMENDED AND RESTATED 1999 STOCK INCENTIVE PLAN OF LENDINGTREE,
                                      INC.
                  1998 STOCK OPTION PLAN OF LENDINGTREE, INC.
        1997 STOCK OPTION PLAN OF CREDITSOURCE USA, INC., FORMERLY KNOWN
                          AS LEWISBURG VENTURES, INC.

                             (FULL TITLE OF PLANS)

                              ----------------------

                                DAVID ELLEN, ESQ.
             VICE PRESIDENT, ACTING GENERAL COUNSEL AND SECRETARY
                                 INTERACTIVECORP
                              152 WEST 57TH STREET
                            NEW YORK, NEW YORK 10019

                     (NAME AND ADDRESS OF AGENT FOR SERVICE)

                                 (212) 314-7300
         (TELEPHONE NUMBER, INCLUDING AREA CODE, OF AGENT FOR SERVICE)

                              ----------------------

      APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO EMPLOYEES: From time
to time after the effective date of this Registration Statement and the
effective time of the merger of a wholly owned subsidiary of InterActiveCorp
with and into LendingTree, Inc.

                         CALCULATION OF REGISTRATION FEE


- ---------------------------------------------------------------------------

                                                     
                                        PROPOSED     PROPOSED
 TITLE OF EACH CLASS OF   AMOUNT TO     MAXIMUM      MAXIMUM      AMOUNT
    SECURITIES TO BE          BE        OFFERING    AGGREGATE     OF
       REGISTERED         REGISTERED     PRICE       OFFERING     REGISTRATION
                                       PER SHARE      PRICE       FEE
- ---------------------------------------------------------------------------
Common Stock, $0.01 par   3,419,514 (1)   N/A          N/A        N/A (2)
value
- ---------------------------------------------------------------------------

(1)This Post-Effective Amendment No. 1 on Form S-8 covers up to 3,419,514
   shares of common stock, par value $0.01 per share ("IAC Common Stock"), of
   InterActiveCorp ("IAC"), formerly USA Interactive, of which 3,419,514 shares
   of IAC Common Stock were originally registered on IAC's Registration
   Statement on Form S-4 (File No. 333-105876), as amended, initially filed with
   the Securities and Exchange Commission on June 5, 2003, to which this
   Amendment relates (the "Registration Statement").
(2)Not applicable.  All filing fees payable in connection with the registration
   of these securities were paid in connection with the Registration Statement.

EXPLANATORY NOTE InterActiveCorp ("IAC" or the "Registrant"), formerly USA Interactive, hereby amends its Registration Statement on Form S-4 (File No. 333-105876) (the "Form S-4") by filing this Post-Effective Amendment No. 1 on Form S-8 to Form S-4 (this "Amendment") relating to up to (i) 1,937,386 shares of common stock, par value $0.01 per share, of IAC ("IAC Common Stock") issuable by IAC in connection with the Amended and Restated 2001 Stock Incentive Plan of LendingTree, Inc. ("LendingTree") (the "2001 Plan"), (ii) 809,732 shares of IAC Common Stock issuable by IAC in connection with the Amended and Restated 1999 Stock Incentive Plan of LendingTree (the "1999 Plan"), (iii) 354,688 shares of IAC Common Stock issuable by IAC in connection with the 1998 Stock Option Plan of LendingTree (the "1998 Plan") and (iv) 317,708 shares of IAC Common Stock issuable by IAC in connection with the 1997 Stock Option Plan of CreditSource USA, Inc., formerly known as Lewisburg Ventures, Inc. (the "1997 Plan" and, together with the 2001 Plan, the 1999 Plan and the 1998 Plan, the "Plans"). All of such shares of IAC Common Stock were originally registered under the Securities Act of 1933, as amended (the "Securities Act"), pursuant to the Form S-4. On August 8, 2003, Forest Merger Corp., a Delaware corporation and a wholly owned subsidiary of IAC ("Forest Merger Corp."), merged (the "Merger") with and into LendingTree, pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 5, 2003, by and among IAC, Forest Merger Corp. and LendingTree. Pursuant to the Merger Agreement, at the time the Merger was consummated, each share of common stock, par value $0.01 per share, of LendingTree ("LendingTree Common Stock") issued and outstanding immediately prior to the time the Merger was consummated (other than LendingTree Common Stock (i) held by LendingTree as treasury stock or (ii) owned by IAC immediately prior to the time the Merger was consummated) was converted into the right to receive (i) 0.6199 (the "Exchange Ratio") of a fully paid and nonassessable share of IAC Common Stock and (ii) cash instead of any fractional share of IAC Common Stock that would otherwise have been issued, without interest. Pursuant to the Merger Agreement, at the time the Merger was consummated, each share of Series A 8% Convertible Preferred Stock, par value $0.01 per share, of LendingTree ("LendingTree Preferred Stock") (other than LendingTree Preferred Stock (i) held by LendingTree as treasury stock, (ii) owned by IAC immediately prior to the time the Merger was consummated or (iii) as to which appraisal rights have been perfected under Delaware law) was converted into the right to receive (i) the number of shares of IAC Common Stock that each share of LendingTree Preferred Stock would have had a right to receive under the Merger Agreement had such LendingTree Preferred Stock been converted into LendingTree Common Stock immediately before the filing by LendingTree of a properly executed certificate of merger (the "Certificate of Merger") or at such later time as agreed to by the parties to the Merger Agreement and set forth in the Certificate of Merger, and (ii) cash instead of any fractional share of IAC Common Stock that would otherwise have been issued, without interest. Pursuant to the Merger Agreement, the outstanding stock options granted under the Plans are no longer exercisable for shares of LendingTree Common Stock but, instead, are exercisable for shares of IAC Common Stock based on the Exchange Ratio, as set forth in the Merger Agreement.

PART I INFORMATION REQUIRED IN THE SECTION 10(A) PROSPECTUS All information required by Part I to be contained in the prospectus is omitted from this Amendment in accordance with Rule 428 under the Securities Act. PART II INFORMATION REQUIRED IN THE REGISTRATION STATEMENT ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE _______________________________________ The following documents previously filed by IAC with the Securities and Exchange Commission (the "Commission") pursuant to the Securities Exchange Act of 1934, as amended (the "Exchange Act"), are incorporated herein by reference: (a) IAC's Annual Report on Form 10-K for the fiscal year ended December 31, 2002. (b) IAC's Quarterly Report on Form 10-Q for the quarter ended March 31, 2003. (c) IAC's Current Reports on Form 8-K filed on January 21, 2003, February 7, 2003, two filed on February 12, 2003, two filed on February 26, 2003, March 19, 2003, March 25, 2003, March 26, 2003, April 9, 2003, April 10, 2003, April 15, 2003, May 2, 2003, May 5, 2003, June 4, 2003, June 19, 2003, June 23, 2003, August 5, 2003 and August 8, 2003 (in each case other than information furnished under Regulation FD). (d) Amendment No. 1 to Registration Statement on Form S-4 (file no. 333-105876) filed on July 10, 2003 (only with respect to the sections entitled "SUMMARY--Selected Unaudited Pro Forma Combined Condensed Financial Information of IAC," "UNAUDITED PRO FORMA COMBINED CONDENSED FINANCIAL INFORMATION OF IAC" and "DESCRIPTION OF IAC CAPITAL STOCK"). All documents subsequently filed by IAC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the filing of a post-effective amendment which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed incorporated by reference in this Registration Statement and to be a part hereof from the date of filing of such documents. Any statement contained herein or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any subsequently filed document which also is or is deemed to be incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement. ITEM 4. DESCRIPTION OF SECURITIES _________________________ Not applicable. 2

ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL ______________________________________ The legality of the shares of IAC Common Stock to be issued in connection with the Plans has been passed upon for IAC by Wachtell, Lipton, Rosen & Katz, New York, New York. ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS _________________________________________ The Registrant's Restated Certificate of Incorporation, as amended, limits, to the maximum extent permitted by Delaware law, the personal liability of directors for monetary damages for breach of their fiduciary duties as a director. The Registrant's Amended and Restated By-Laws provide that the directors and officers (and legal representatives of such directors and officers) will be indemnified to the fullest extent authorized by the General Corporation Law of the State of Delaware (the "DGCL") with respect to third-party actions, suits, investigations or proceedings provided that any such person has met the applicable standard of conduct set forth in the DGCL described below. The Registrant's Amended and Restated By-Laws further provide that directors and officers (and legal representatives of such directors and officers) will be indemnified with respect to actions or suits initiated by such person only if such action was first approved by the board of directors. The Registrant's Amended and Restated By-Laws allow the Registrant to pay all expenses incurred by a director or officer (or legal representatives of such directors or officers) in defending any proceeding in which the scope of the indemnification provisions as such expenses are incurred in advance of its final disposition, upon an undertaking by such party to repay such expenses, if it is ultimately determined that such party was not entitled to indemnity by the Registrant. From time to time, officers and directors may be provided with indemnification agreements that are consistent with the foregoing provisions. The Registrant has policies of directors' and officers' liability insurance which insure directors and officers against the costs of defense, settlement and/or payment of judgment under certain circumstances. The Registrant believes that these agreements and arrangements are necessary to attract and retain qualified persons as directors and officers. Section 145 of the DGCL provides that a corporation may indemnify a director, officer, employee or agent who was or is a party, or is threatened to be made a party to any action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he was a director, officer, employee or agent of the corporation or was serving at the request of the corporation against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by him in connection with such action if he acted in good faith and in a manner he reasonably believed to be in, or not opposed to, the best interests of the corporation and, with respect to any criminal action or proceeding, had no reasonable cause to believe his conduct was unlawful. ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED ___________________________________ Not Applicable. ITEM 8. EXHIBITS ________ See Exhibit Index. 3

ITEM 9. UNDERTAKINGS ____________ (a) The undersigned Registrant hereby undertakes: (1) To file, during any period in which offers or sales are being made, a post-effective amendment to this Registration Statement: (i) To include any prospectus required by Section 10(a)(3) of the Securities Act; (ii) To reflect in the prospectus any facts or events arising after the effective date of this Registration Statement (or the most recent post-effective amendment hereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement; (iii) To include any material information with respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information in this Registration Statement; provided, however, that paragraphs (1)(i) and (1) (ii) do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in periodic reports filed with or furnished to the Securities and Exchange Commission by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in this Registration Statement. (2) That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial BONA FIDE offering thereof. (3) To remove from registration by means of a post- effective amendment any of the securities being registered which remain unsold at the termination of the offering. (b) The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant's annual report pursuant to Section 13(a) or 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan's annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. (c) Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such 4

director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue. 5

SIGNATURES Pursuant to the requirements of the Securities Act of 1933, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, State of New York, on this 8th day of August, 2003. INTERACTIVECORP By: /s/ Dara Khosrowshahi -------------------------------------- Name: Dara Khosrowshahi Title: Executive Vice President and Chief Financial Officer Pursuant to the requirements of the Securities Act, this registration statement has been signed by the following persons in the capacities indicated as of August 8, 2003. SIGNATURE TITLE /s/ Barry Diller* Chairman of the Board, Chief ________________________________ Executive Barry Diller /s/ Victor A. Kaufman* ________________________________ Victor A. Kaufman Vice Chairman and Director /s/ William J. Severance* ________________________________ William J. Severance Vice President and Controller (Chief Accounting Officer) /s/ Dara Khosrowshahi ________________________________ Dara Khosrowshahi Executive Vice President and Chief Financial Officer /s/ Richard N. Barton* ________________________________ Richard N. Barton Director /s/ Robert R. Bennett* ________________________________ Robert R. Bennett Director /s/ Edgar Bronfman, Jr.* ________________________________ Edgar Bronfman, Jr. Director

/s/ Donald R. Keough* Director ________________________________ Donald R. Keough /s/ Marie-Josee Kravis* ________________________________ Marie-Josee Kravis Director /s/ John C. Malone* ________________________________ John C. Malone Director /s/ Gen. H. Norman Schwarzkopf* ________________________________ Gen. H. Norman Schwarzkopf Director /s/ Alan Spoon* ________________________________ Alan Spoon Director /s/ Diane Von Furstenberg* _______________________________ Diane Von Furstenberg Director * By: /s/ Dara Khosrowshahi ________________________________ Dara Khosrowshahi Attorney-in-Fact

EXHIBIT INDEX EXHIBIT NUMBER DESCRIPTION ________________ ______________________________________________________________ 5.1 Opinion of Wachtell, Lipton, Rosen & Katz as to the validity of the shares being issued. 23.1 Consent of Ernst & Young LLP. 23.3 Consent of Wachtell, Lipton, Rosen & Katz (included in Exhibit 5.1 hereto). 24.1 Powers of Attorney.* 99.11 Amended and Restated 2001 Stock Incentive Plan of LendingTree, Inc. (previously filed as Appendix A to the LendingTree, Inc. Proxy Statement on Schedule 14A filed March 14, 2003). 99.12 Amended and Restated 1999 Stock Incentive Plan of LendingTree, Inc. (previously filed as Exhibit 10.17 to the LendingTree, Inc. Registration Statement on Form S-1/A filed January 27, 2000). 99.13 1998 Stock Option Plan of LendingTree, Inc. (previously filed as Exhibit 10.4 to the LendingTree, Inc. Registration Statement on Form S-1/A filed January 11, 2000). 99.14 1997 Stock Option Plan of CreditSource USA, Inc., formerly known as Lewisburg Ventures, Inc. (previously filed as Exhibit 10.5 to the LendingTree, Inc. Registration Statement on Form S-1/A filed January 11, 2000). * Previously filed on June 5, 2003.

                                                                     Exhibit 5.1



                   [Wachtell, Lipton, Rosen & Katz Letterhead]

                                 August 8, 2003


InterActiveCorp
152 West 57th Street
New York, New York  10019

         Re:     Post-Effective Amendment No. 1 on Form S-8
                 to Registration Statement on Form S-4 (File No. 333-105876)
                 ___________________________________________________________

Ladies and Gentlemen:

                  We have acted as special counsel to InterActiveCorp, a
Delaware corporation (the "Company"), in connection with the preparation and
filing of Post-Effective Amendment No. 1 on Form S-8 (the "Post-Effective
Amendment") to the registration statement on Form S-4 (File No. 333-105876) of
IAC (as amended, the "Registration Statement") relating to up to 3,419,514
shares of common stock, par value $0.01 per share (the "Common Stock"), of the
Company issuable by the Company pursuant to the Amended and Restated 2001 Stock
Incentive Plan of LendingTree, Inc., the Amended and Restated 1999 Stock
Incentive Plan of LendingTree, Inc., the 1998 Stock Option Plan of LendingTree,
Inc. and the 1997 Stock Option Plan of CreditSource USA, Inc., formerly known as
Lewisburg Ventures, Inc. (collectively, the "Plans").

                  In rendering this opinion, we have examined such corporate
records and other documents (including the Company's amended and restated
certificate of incorporation, as amended, amended and restated bylaws, the
Registration Statement and the Plans), and we have reviewed such matters of law,
as we have deemed necessary or appropriate. In rendering this opinion, we have,
with your consent, relied upon oral and written representations of officers of
the Company and certificates of officers of the Company and public officials
with respect to the accuracy of the factual matters addressed in such
representations and certificates. In addition, in rendering this opinion we
have, with your consent, assumed the genuineness of all signatures or
instruments relied upon by us, and the conformity of certified copies submitted
to us with the original documents to which such certified copies relate.

                  We are members of the Bar of the State of New York and we
express no opinion as to the laws of any jurisdiction other than the federal
laws of the United States, the General Corporation Law of the State of Delaware
and the laws of the State of New York.

                  Based on and subject to the foregoing, we are of the opinion
that the Common Stock will be, upon issuance and delivery pursuant to the terms
and conditions set forth in the Registration Statement and the Plans, legally
issued, fully paid and nonassessable.

[Wachtell, Lipton, Rosen & Katz Letterhead] August 8, 2003 Page 2 We hereby consent to be named in the Registration Statement and in the related prospectus contained therein as the attorneys who passed upon the legality of the Common Stock and to the filing of a copy of this opinion as Exhibit 5.1 to the Registration Statement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended. Very truly yours, /s/ Wachtell, Lipton, Rosen & Katz

                                                                    EXHIBIT 23.1

                         CONSENT OF INDEPENDENT AUDITORS


We consent to the incorporation by reference in the Registration Statement
(Post-Effective Amendment No. 1 on Form S-8 to Form S-4 No. 333-105876) of
InterActiveCorp (formerly USA Interactive) of our report dated February 6, 2003,
with respect to the consolidated financial statements and schedule of USA
Interactive (presently InterActiveCorp) included in its Annual Report (Form
10-K) for the year ended December 31, 2002, filed with the Securities and
Exchange Commission.


                                                    /s/ Ernst & Young LLP


New York, New York
August 7, 2003