Avril Lavigne on stage

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Katy Perry on rocket ship

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Katy Perry in tattooed outfit

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Katy Perry at Smurfs premiere

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Katy Perry in plaid outfit

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Katy Perry in green dress

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Katy Perry promotional image

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Katy Perry in black dress

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Miley Cyrus performing on stage

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Miley Cyrus on stage

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Rihanna on stage in leather jacket

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Miley Cyrus performing on stage

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Silhouette of Woman on Stage

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Katy Perry performing on stage

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Katy Perry performs 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 with Homer Simpson puppet

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Katy Perry on red carpet

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Katy Perry on red carpet

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