High Quality Content by WIKIPEDIA articles! "S M" is a song by Barbadian recording artist Rihanna, taken from her fifth studio album, Loud (2010). The song was written by Mikkel S. Eriksen, Tor Erik Hermansen, Corey Jackson Carter, Sandy Wilhelm and Ester Dean, with production helmed by Eriksen and Hermansen of Stargate and Sandy Wilhelm under her stage name Sandy Vee. "S M" was released on January 21, 2011, as the album`s fourth United States single and third international single. "S M" is a Eurodance song, and incorporates elements of dance-pop. Critical reception of "S M" was mixed, as some reviewers criticized the song`s overt use of sexual lyrics, while others called it a stand-out track from Loud. In April 2011, the song was re-released as a remix single to digital outlets, featuring guest vocals by American recording artist Britney Spears.