"Sleep" is a song by Scottish band Texas, released as the third and final single from their seventh studio album, Red Book (2005), on 9 January 2006. The song features Paul Buchanan from fellow Scottish musical group the Blue Nile. "Sleep" was released on 9 January 2006 in three different formats: two audio CD singles and a DVD single. The song peaked at number six on the UK Singles Chart, and as of 2021, it remains their last UK top-40 hit.