Kristen Stewart, Lip-Biting Beauty

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Our pal Dan over at College Humor noticed something funny about Kristen Stewart: the girl gets off on biting her lip – a lot. In just about every movie she’s in, she’s constantly chomping down on her pretty pink mouth. We’ve seen her do it in interviews too, so it must just be some strange habit K-Stew can’t kick. Perhaps she’s just practicing her vamp moves for Breaking Dawn?