We've got a great way to start out the new week -- the official remix of Rihanna's "S&M," featuring Britney Spears!
RiRi teased the new collaboration this weekend on her Twitter, saying "I got a #SEXY collabo comin your way supa dupa soon!!!! OH YEAH!!! By popular demand.... Its BRITNEY BITCH!!!!"
The new version of the song, which premiered this morning on Z100, has Spears singing some new lyrics, including the words "It's your turn to hurt me ... If I'm bad tie me down, shut me up, gag and bound me."
Listen to the song below, then let me know which version you like better!