Rated R is the fourth studio album by Barbadian singer Rihanna. It was released on November 20, 2009, by Def Jam Recordings and SRP Records. Recording sessions for the album began in March 2009 and took place at recording studios throughout United States and Europe. Rihanna was the executive producer of the album alongside Antonio "L.A." Reid and The Carter Administration. It features additional production by various record producers, including Chase & Status, Stargate, The-Dream, Ne-Yo, and Brian Kennedy. The record features several vocalists and instrumentalists, including Young Jeezy, will.i.am, Justin Timberlake and Slash, who played the guitars in "Rockstar 101".