"Jealousy" is a song by the British singer Will Young. It was written by Will Young, Kish Mauve, and Jim Eliot for his fifth studio album Echoes (2011), while production was helmed by Richard X, with Eliot and Pete Hofmann credited as additional producers. The song was released as the album's lead single on 19 August 2011 in the United Kingdom and received widespread acclaim from music critics, eventually winning music website Popjustice's £20 Music Prize in 2012. "Jealousy" gave Young his first UK top-five hit in five years.

Echoes is the fifth studio album by English recording artist Will Young. It was released by RCA Records and Sony Music on 19 August 2011. A departure from previous albums which saw him working with a diverse roster of collaborators, Young worked with music producer Richard X and Pete Hofmann on the bulk of the album. A television special, A Night With Will Young, aired on ITV on 27 August 2011 to coincide with the release of the album and recognising Young's impending ten-year anniversary in the music industry.