Britney Spears and Rihanna Perform at the 2011 Billboard Music Awards
By:Radar Staff
May 22 2011, Published 11:36 a.m. ET
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Britney Spears and Rihanna Perform at the 2011 Billboard Music Awards
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1. Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.
Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.
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2. Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.
Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.
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3. Rihanna performs on stage at the 2011 Billboard Music Awards.
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Rihanna performs on stage at the 2011 Billboard Music Awards.
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4. Britney Spears performs on stage at the 2011 Billboard Music Awards.
Britney Spears performs on stage at the 2011 Billboard Music Awards.
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5. Britney Spears performs on stage at the 2011 Billboard Music Awards.
Britney Spears performs on stage at the 2011 Billboard Music Awards.