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  • CHEER LEADERS photo | Jessica Simpson, Michelle Obama

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Published: Thursday Apr 14, 2011 | 05:00 PM EDT

CHEER LEADERS

Jessica Simpson and Michelle Obama team up Wednesday to pay tribute to the country's service men and women at Denver's Coors Field. Simpson, one of PEOPLE's Most Beautiful, performed "God Bless America" as part of the First Lady's "Joining Forces" initiative.