Who needs gossip when we have the real thing - Britney Spears and Rihanna have collaborated on an S&M remix! You heard us right - the two divas of pop, hottest on the planet decided to turn up the heat and barbeque fans to a sizzle - we didn't even see this coming.

Britney drops a whole new verse that doesn't leave much room for speculation. "Tough, I don’t scream mercy / It’s your turn to hurt me” and “If I’m bad, tie me down / Shut me up, gag and bound me.”

Britney and Rihanna play almost literally with each other as they trade off lines in the second half of the song.

Rihanna was the first to break the news to her fans via Twitter:

The Umbrella star tweeted: "I got a SEXY collabo comin your way supa dupa soon!!!! OH YEAH!!! By popular demand.... Its BRITNEY B****!!!!

"One of the biggest worldwide popstars! U gangsta. EPIC."

Slave 4 U Brit replied: "Rihanna You're such a tease! I like it, like it...

Britney most recently released Till The World Ends which clearly refers to Brit's first public sexually explicity video Slave 4 U.

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