"S&amp;M" is a song by Barbadian singer Rihanna. It is about BDSM. It is the third single off her studio album "Loud" (2010). Another version of the song featuring pop singer Britney Spears was released after Rihanna instructed fans to vote for an artist to be featured on the remix of the song. It has charted successfully in twelve countries. It hit number one in the United States, Canada, and Australia, while reaching the top three in the United Kingdom.