Rihanna may have taken a lot of hardware away from the stage on Sunday night, but it was what she didn't bring up in front of a national audience at the Billboard Awards that's making headlines.
Rihanna, who took three awards home on the night, rocked "S&M" in a spandex, pantless number, adorned with handcuffs and chains, just as her song describes -- hey, she says they excite her. Writhing around on stage, she gave the fans in the building and at home more than a thrill. And that was before a certain guest came on the stage.
Britney Spears, who teamed up Rihanna recently for a remix of the club hit, took the stage in a mask and black version of Rihanna's skimpy attire, and the two traded verses while making use of the conveniently arranged set.
HuffPost Entertainment is your one-stop shop for celebrity news, hilarious late-night bits, industry and awards coverage and more — sent right to your inbox six days a week. Learn more