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And the classiest side butt award goes to ... Selena Gomez! The 20-year-old attended the "Spring Breakers" Los Angeles premiere in March looking stunning in this red Reem Acra gown, which showed off just a little thanks to embroidered side panels. Maybe Selena was sick of skimpy outfits after prancing around in a bikini for most of "Spring Breakers"? (3/14/2013)

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