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Celebs Revealed: Stars Working Out

By Katie Mathewson Slide 1 of 20

Celebrities don't need an event or season to stay in shape -- they're always working out. Now, we know that you know your stars, so we want to put that knowledge to the test. Click ahead to see if you can identify these sweaty celebs solely by their bulging biceps, toned gams, and favorite workout activities!RELATED:Kate and Will's favorite sports This Aussie hottie has a fierce on-screen alter ego that he has to bulk up for. Do you recognize the swollen muscles and popping veins of this gym rat?
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