Rihanna

Billboard Music Awards 2011: Rihanna and Britney openning show

Billboard Music Awards 2011: Rihanna and Britney openning showBritney Spears joined Bajan songstress Rihanna to kick off the star-studded ceremony of 2011 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas on May 22. The two female artists steamed up the stage with a live duet of RiRi's raunchy single "S&M".

Rihanna was dressed in a white leather bustier with nearly-thigh high boots, and was joined by Britney which wore an equally naughty outfit, a black vinyl bunny gear.

Billboard Music Awards 2011: Rihanna 'S&M' feat Britney Spears :

Also, Britney performed with the female rapper Nicki Minaj. This time they performed Britney's single 'Till the World Ends'. She was introduced by Taylor Swift who is a fan of the song.

After reprising her "Super Bass" lap dance she introduced Britney for some verses of their song. Watch the live performance below:

Billboard Music Awards 2011: Nicki Minaj performs 'Super Bass' and 'Till the World Ends' feat Britney Spears :