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