Rihanna and Kanye West pose backstage during Z100's Jingle Ball 2...

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Ashley Tisdale (center) and The Veronicas pose backstage during Z...

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Brandy and Lady GaGa pose backstage during Z100's Jingle Ball 200...

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Chris Brown poses backstage during Z100's Jingle Ball 2008 Prese...

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Katie Couric poses backstage during Z100's Jingle Ball 2008 Prese...

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Katie Couric, Rihanna, Natasha Bedingfield and Leona Lewis pose b...

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Katy Perry poses backstage during Z100's Jingle Ball 2008 Present...

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Lady GaGa poses backstage during Z100's Jingle Ball 2008 Present...

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Lady GaGa poses backstage during Z100's Jingle Ball 2008 Presente...

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Leona Lewis poses backstage during Z100's Jingle Ball 2008 Presen...

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Leona Lewis poses backstage during Z100's Jingle Ball 2008 Presen...

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Natasha Bedingfield, Rihanna and Leona Lewis pose backstage durin...

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Natasha Bedingfield, Rihanna and Leona Lewis pose backstage durin...

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Ne-Yo poses during Z100's Jingle Ball 2008 Presented by H&M at Ma...

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Nick Lachey and Ashley Tisdale pose backstage during Z100's Jingl...

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Nick Lachey and Ashley Tisdale pose backstage during Z100's Jingl...

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Recording artist Rihanna and tv personality Katie Couric pose bac...

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Rihanna and Brandy pose backstage during Z100's Jingle Ball 2008 ...

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Rihanna and Brandy pose backstage during Z100's Jingle Ball 2008 ...

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Rihanna and Brandy pose backstage during Z100's Jingle Ball 2008 ...

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Rihanna and Kanye West pose backstage during Z100's Jingle Ball 2...

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Rihanna and Kanye West pose backstage during Z100's Jingle Ball 2...

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Rihanna and Kanye West pose backstage during Z100's Jingle Ball 2...

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Rihanna poses backstage during Z100's Jingle Ball 2008 Presented ...

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Katie Couric poses backstage during Z100's Jingle Ball 2008 Prese...

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Katy Perry poses backstage during Z100's Jingle Ball 2008 Present...

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Lady GaGa poses backstage during Z100's Jingle Ball 2008 Present...

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Leona Lewis poses backstage during Z100's Jingle Ball 2008 Presen...

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Natasha Bedingfield, Rihanna and Leona Lewis pose backstage durin...

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Natasha Bedingfield, Rihanna and Leona Lewis pose backstage durin...

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Ne-Yo poses during Z100's Jingle Ball 2008 Presented by H&M at Ma...

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Nick Lachey and Ashley Tisdale pose backstage during Z100's Jingl...

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Nick Lachey poses backstage during Z100's Jingle Ball 2008 Presen...

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Nick Lachey poses backstage during Z100's Jingle Ball 2008 Presen...

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Recording artists The Veronicas pose backstage during Z100's Jing...

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Recording artists The Veronicas pose backstage during Z100's Jing...

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Singer Lady GaGa poses backstage during Z100's Jingle Ball 2008 P...

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