Exhibit 32.1

Certification of CEO and CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

The undersigned, the Chief Executive Officer and the Chief Financial Officer of Sunstone Hotel Investors, Inc. (the “Company”), pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each hereby certifies that to his knowledge on the date hereof:

(a) The Quarterly Report on Form 10-Q of the Company for the quarter ended June 30, 2008, filed on the date hereof 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; and

(b) Information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 5, 2008	/s/    Robert A. Alter
	Robert A. Alter
	Chief Executive Officer and Executive Chairman
Date: August 5, 2008	/s/    Kenneth E. Cruse
	Kenneth E. Cruse
	Chief Financial Officer