Britney Spears Rihanna Share Stage With “S&M Remix”

What in the name of burlesque? Britney Spears and Rihanna kicked off the 2011 Billboard Music Awards with an NC-17-rated performance of their pop collab, “S&M Remix,” live from Las Vegas on Sunday night.There were plenty of feathers flying and ample pole-dancing (We almost thought we’d been hydroplaned to the middle of a Miley Cyrus concert…_) as the pop divas shared the stage for the first