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Jessica Biel Gets Physical With Jimmy Fallon (VIDEO)

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As soon as we had recovered from watching Gwyneth demonstrate her butt exercises for Conan O'Brien Thursday night, another late night host used the same gambit to engage his attractive female guest.

Wearing short-shorts and a headband, Jimmy Fallon did some awkward warm-up moves with Jessica Biel before she led him through a workout involving a punching bag, free weights and a pull-up bar. The segment revolved around Biel showing off (see one-armed pull-ups, handstand walking) and Fallon riffing on his inability to keep up.

Biel recently said that her beauty is keeping her from getting serious roles. Way to take the attention off of that bodacious bod!

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