"Work" is the fifth single by English-Irish girl group The Saturdays. The pop song was written by Ina Wroldsen, Harry Sommerdahl and Kalle Engström. "Work" was released on 29 June 2009 as the final single from the group's debut album, Chasing Lights. The single was released by Fascination Records in the United Kingdom and Europe, while releasing the single in Ireland under the label of Polydor Records.

The song was released with a music video, which was filmed on 16 May 2009 at Shepperton Studios. The music video features a different beat to the single. The music video became the band's most viewed video (at the time of the release), and which took concept of the band's upcoming tour to be titled The Work Tour. "Work", kicked the tour off, by having clips of the music video, where they do the catwalk.

Although the song was a fan favourite, it failed to gain the success of the band's four previous singles. It charted at number 22 on the UK Singles Chart, number 21 on the Irish Singles Chart and 68 on the European Hot 100 Singles. The song became the band's lowest charting single in the UK at the time, and their first to miss the top ten. The single was remixed by audio and music technician, Phil Tan for its release.

"Work" was originally scheduled to be released as the third single from Chasing Lights, but the song "Issues" was released instead. Then it was rescheduled to be the fourth single, but was pushed back once again as they were given opportunity to record the 2009 Comic Relief single, a cover of Depeche Mode's "Just Can't Get Enough". Its CD single release coincided with the group's first series of headline gigs, The Work Tour, in June 2009.

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