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Singers Britney Spears, left, and Rihanna perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Britney Spears performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Rihanna performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Taylor Swift accepts the Country Artist of the Year onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Justin Bieber accepts the Digital Artist of the Year award onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singers Taboo, will.i.am, Fergie, and apl de ap of Black Eyed Peas perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musicians The Edge, Bono, Larry Mullen Jr. and Adam Clayton of the band U2 accept the Touring Top Artist Award onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Kesha performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musician Cee Lo Green performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Beyonce Knowles accepts the Millennium Award from her mother, Tina Knowles, onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Beyonce performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Host Ken Jeong, left, and actor Eric Stonestreet speak onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musician Joe Jonas speaks onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musician Neil Diamond performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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From left, musicians Charles Kelley, Hillary Scott and Dave Haywood of the band Lady Antebellum accept the Country Song of the Year award onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Host Ken Jeong speaks onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Rapper Nicki Minaj performs onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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TV personality Randy Jackson speaks onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Host Ken Jeong and musician Keith Urban perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Mary J. Blige, left, and rapper Lil Wayne perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singers Britney Spears and Rihanna perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Actor Rico Rodriguez and actress/singer Selena Gomez speak onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Ne-Yo and rapper Pitbull perform onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Rapper Nas, left, and host Ken Jeong speak onstage during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Taylor Swift poses in the press room with her awards during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Justin Bieber poses in the press room with the Digital Artist of the Year award during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Beyonce poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musicians Larry Mullen Jr., Adam Clayton, Bono and The Edge of U2 pose in the press room with the Touring Top Artist Award during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Rapper Snoop Dogg poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musician Bret Michaels poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Musician Travis Barker poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Kelly Rowland poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Singer Taio Cruz poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Actor/singer Matthew Morrison poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Recording artist Trey Songz poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
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Host Ken Jeong poses in the press room during the 2011 Billboard Music Awards at the MGM Grand Garden Arena on May 22, 2011, in Las Vegas.
