Rihanna and Britney Team Up

You wanted it-here it is! Britney Spears teamed up with Rihanna on an S&M Remix.  

The collaboration premiered today on NYC'S Z100.  Spears' Femme Fatale just debuted as number 1 on the Billboard 200. Click here to hear the remix.  What do you think?  Is there anyone else you would have preferred to see remix the song with Rihanna?