Katy Perry in white dress

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Katy Perry in red dress

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Katy Perry performing on stage

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Selena Gomez promotional photo

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Katy Perry performing on stage

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Katy Perry performing on stage

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Katy Perry at MTV Studios

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Katy Perry at Smurfs premiere

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Katy Perry performing on stage

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Katy Perry performing on stage

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Katy Perry performing on stage

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Katy Perry at MTV Awards

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Kesha photo collage

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Mariah Carey in Heartbreaker top

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Jennifer Lopez in white top

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Avril Lavigne in black corset

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Avril Lavigne making a face

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Avril Lavigne posing in corset

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Avril Lavigne in red dress

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Jessica Simpson in sequined outfit

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