Guess' (GES) 10-Q 2008 Q3 Quarterly report

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

I, Paul Marciano, Chief Executive Officer and Vice Chairman of the Board of Guess?, Inc. (the “Company”), do hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

•the Quarterly Report on Form 10-Q of the Company for the period ended November 3, 2007, as filed with the Securities and Exchange Commission (the “Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

•the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: December 12, 2007	By:	/s/ PAUL MARCIANO
		Paul Marciano
		Chief Executive Officer and
		Vice Chairman of the Board