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Stars' Sporty Styles!

From the Kardashian sisters to Audrina Patridge, see how celebs are staying athletic-chic for their workouts

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REESE WITHERSPOON

With a cute canvas tote in tow, Reese Witherspoon – in a Nike tank and stretch capris – leaves a Pilates class in Brentwood, Calif. The actress has also been working up a serious sweat honing her pitching skills in the movie How Do You Know? Talk about a calorie-burner: one hour of throwing the ball shaves over more than 350 calories!