Cougar Biotechnology 10QSB 2007 Q3 Quarterly report (small business)

EXHIBIT 32.1

CERTIFICATION

OF

CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the undersigned officers of Cougar Biotechnology, Inc. do hereby certify that to the best of their knowledge:

(a) the Quarterly Report on Form 10-QSB of Cougar Biotechnology, Inc. for the quarter ended September 30, 2007 (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of Cougar Biotechnology, Inc.

Dated:	November 13, 2007	/s/ Alan H. Auerbach
		Alan H. Auerbach
		Chief Executive Officer and President
Dated:	November 13, 2007	/s/ Charles R. Eyler
		Charles R. Eyler
		Treasurer