In pictures: Billboard music award winners 2011

23 May 2011 Last updated at 11:11

Eminem and Justin Bieber win six awards each at this year's Billboard music awards in Las Vegas, while Taylor Swift wins top album prize.
Taylor Swift
Taylor Swift won country artist of the year at the Billboard music awards held in Las Vegas. She also won top album artist for selling 1.47 million first week copies of her third album, Speak Now, in the US last November.
Justin Bieber
Justin Bieber was named best new artist. He also bagged top pop album, streaming artist and song, as well as social and digital media artist. He thanked "everybody who helped me get out of my home town and live my dream".
Britney Spears and Rihanna
Rihanna was joined on stage by Britney Spears for a pillow fight before going on to win three awards including top female and top radio artist of the year.
After taking home three prizes, Rihanna thanked her biggest fans, the "Rihanna navy" and her home country of Barbados.
Snoop Dogg
Snoop Dogg awarded Justin Bieber the top new artist award. He also took to the stage to perform with Far East Movement. They sang If I was You (OMG).
Britney Spears
Britney Spears made an appearance in a mask before unveiling herself to loud applause from the audience, as well as having that pillow fight with Rihanna. She also performed with rapper Nikki Minaj.
Beyonce was given the millennium award for her musical influence and hailed as a role model for women. She performed new single, Run The World (Girls).
Nicki Minaj
Nicki Minaj was beaten to best new artist by Justin Bieber. She started her performance with single, Super Bass, before Britney joined her on stage for Till the World Ends. They're due to tour together in the US in the summer.
Ne-Yo and Pitbull
Ne-Yo performed with Pitbull. He said: "I know Rihanna is performing. She is going to be wearing close to nothing. It's a lot of partially naked women and flamingo feathers and me. It's a perfect night."
Black Eyed Peas
Black Eyed Peas won the top duo or group award. Accepting the gong thanked "technology because without technology we wouldn't be here as an industry".