Disney's live-action tween projects, like High School Musical and The Suite Life of Zack & Cody, are some of the most lucrative entertainment franchises in recent history. Kids get to nurse their meaningless prepubescent crushes, while parents are comforted by Disney's squeaky clean role models—and as Miley Cyrus and Vanessa Hudgens found out, straying from their chaste likenesses can be a career-limiting game of PR brinkmanship.

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