All Pumped Up: Stars Working Out!

Feeling less-than-great about bikini season? Motivate yourself with these photos of celebs breaking a sweat (23 Photos)

Ali Gray on May 20, 2011 at 4:00AM

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All Pumped Up: Stars Working Out!

Kevin Mazur/Contributor Collection:WireImage

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Beyonce

Talk about a fun day at school! Beyonce surprises students at a middle school in Harlem, N.Y., as part of Michelle Obama's "Let's Move" campaign on May 3 in N.Y.C. The superstar got the kids on their feet and taught them moves to her song "Move Your Body."

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