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