"I Want You Back" is a song recorded by English girl group Bananarama. It is included on their fourth studio album Wow! and was released as its fourth and final single. The track was co-written and produced by the Stock Aitken Waterman (SAW) trio.

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The song originally had a different chorus and was titled "Reason for Living". Bananarama disliked this chorus and co-wrote the revised lyrics for "I Want You Back".

 

Both versions were originally recorded with Siobhan Fahey for the 1987 Wow! album. For the April 1988 single release, the song was re-recorded with Jacquie O'Sullivan, who had replaced Fahey in March 1988.

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"Reason for Living" was included on the deluxe version of Wow!, which was released in 2013. Elements of the original chorus can be heard in both the original Wow! version of "I Want You Back" and in the Extended European Mix of the 1988 single release.

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"I Want You Back" became one of Bananarama's highest-charting hits, peaking at number five on the UK Singles Chart. It also climbed into the top three in Australia and the top ten in New Zealand. The single was not released in the United States.

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The video featured the group performing the song in various scenarios. One has the three girls performing a choreographed dance routine before the camera. Another has them acting silly, dancing spontaneously, and humorously fighting for screen time. Another scenario features the girls performing their dance routine dressed in silver gowns and wigs as The Supremes. These scenes are interspersed with go-go boys dancing with wigs or in cages clad only in briefs and glow-in-the-dark body paint. An alternative version exists with a scenario of the girls in long wigs replacing the choreographed dance routine scenes. Both videos were directed by Andy Morahan.