Britney Spears, Rihanna Team for 'S&M' Remix

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Britney Spears and Rihanna have teamed up for a raunchy remix of the latter's hit single, "S&M." The collaboration, which premiered today on New York radio station Z100, features the pop divas trading lines from the song's original chorus and an entirely new second verse by Spears.

Rihanna and Britney Spears, "S&M" (Remix)

"If I'm bad, tie me down," Spears coos, taking a cue from Rihanna's just-as-provocative original version of the song. "Shut me up, gag and bound me/'Cause the pain is my pleasure/Nothing comes better."

The "S&M" remix comes at a time when both Spears and Rihanna are riding high: Spears' new album"Femme Fatale" just debuted at No. 1 on the Billboard 200, while Rihanna's original "S&M," which is perched at No. 2 on the Hot 100, just became her record eighth chart-topper on Pop Songs.

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Spears and Rihanna acknowledged each other's hot streaks on Twitter just hours before the "S&M" remix dropped, with Rihanna telling Spears that she is "one of the biggest worldwide popstars! U gangsta #EPIC." Replied Spears, "You ain't so bad yourself honey."

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What do you think of Britney and Rihanna's "S&M" remix?