Britney Spears and Rihanna Perform at the 2011 Billboard Music Awards

Posted on May 22, 2011 @ 8:36AM

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Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.

Photo: Getty Images

Posted on May 22, 2011 @ 8:36AM

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Britney Spears and Rihanna perform on stage at the 2011 Billboard Music Awards.

Photo: Getty Images

Posted on May 22, 2011 @ 8:36AM

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Rihanna performs on stage at the 2011 Billboard Music Awards.

Photo: Wire Image

Posted on May 22, 2011 @ 8:36AM

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Britney Spears performs on stage at the 2011 Billboard Music Awards.

Photo: Getty Images

Posted on May 22, 2011 @ 8:36AM

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Britney Spears performs on stage at the 2011 Billboard Music Awards.

Photo: Getty Images

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