"Best Friend" by 50 Cent is the third single released from the soundtrack of the film "Get Rich or Die Tryin'" (2005) and the remix featuring Olivia is the third single from her album, "Behind Closed Doors". It is also featured on the 2006 edition of 50 Cent's 2005 album, "The Massacre".
50 cent released two singles before "Best Friend"  from the soundtrack of the film "Get Rich or Die Tryin'" (2005)