Rihanna & Britney spears collaborate for 'sexy' 'S&M'

Rihanna has enlisted the help of Britney Spears for a remixed version of her top five hit 'S&M'.
The 'Only Girl (In The World)' singer revealed the collaboration via an announcement on Twitter.
"I got a #SEXY collabo comin your way supa dupa soon!!!! OH YEAH!!! By popular demand. Its BRITNEY BITCH!!!! One of the biggest worldwide popstars! U gangsta #EPIC (sic)," she wrote.
To which Spears responded: "You're such a tease! I like it, like it…. You think they're ready Ri Ri?… -Britney."
There has been no confirmation of a release date for the remix.
The star recently revealed that the lyrics for 'S&M' are metaphorical, stating that it's about a "love-hate relationship with the media".
Rihanna responded to the controversy surrounding her video for the track by declaring that it was her "favourite video [she's] ever done".