"Song 4 Lovers" is a song by English pop group Liberty X, released as the lead single from their third studio album, X (2005). The song features uncredited vocals from Rev Run of Run-D.M.C. and was produced by Liberty X member Tony Lundon. The single was released on 26 September 2005 and peaked at No. 5 on the UK Singles Chart, becoming the band's highest-charting single from the album.

Liberty X are an English/Irish pop group originally consisting of Michelle Heaton, Tony Lundon, Kevin Simm, Jessica Taylor and Kelli Young. Since 2017, Heaton, Taylor and Young have performed as a girl group trio.