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In this photo provided by StarPix, actress Miranda Cosgrove stops for a photo at a Seventeen magazine event, Saturday, June 25, 2011, in New York. (AP Photo/StarPix, Dave Allocca

Slideshow: Young stars who look mature

1 January 1970

They're teenagers? Really? Forget overspending at the mall, exceeding cell phone minutes, and staying out past curfew—today's famous teens are living large and dressing the part.