Britney Spears Rihanna 2011 Billboard Awards.jpg

It was a clash of the popstrels overnight as Britney Spears and Rihanna took to the stage together at this year's Billboard Music Awards. For fans of pop it was a moment in history as Britney revived that famous kiss she once shared with Madonna back in 2003, by having one planted on her by Rihanna. Although more of a kiss on the cheek than a pash, the pair also performed Rihanna's hit track S&M while dressed in contrasting black and white bondage gear. Think PVC, chains, straps, belts, fishnets, masks and boots.

Check out a clip of their performance here.