Rihanna: S&M

What can I say about S&M, other than it is a very controversial song?  However I happen to like it quite a bit.  In fact, Britney Spears did a remix with Rihanna for this song, and it is absolutely stunning.  Other than that; it was released as Loud’s fourth single although outside of the United States it was released as the third single.  Which is why I consider it to be Loud’s third single and not fourth because I live outside of the United States.