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Heidi Montag Filming a Movie, Kristen Stewart on Jimmy Fallon, and Video of Kara DioGuardi in a Bikini

Video: Heidi Montag Being Ridiculous, Kristen Joking With Jimmy and Kara's Bikini Photo Shoot!

Heidi Montag wears tiny shorts that she designed herself and not much on top while working on the set of her new movie, Kristen Stewart explains the different kinds of sexy and American Idol judge Kara DioGuardi breaks out her bikini collection for a photo shoot. Watch it all on PopSugar Rush!

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