"Turn Around (5, 4, 3, 2, 1)" is a song by American rapper Flo Rida from his third studio album, Only One Flo (Part 1). It was released as the second single on 8 November 2010 in the United States. The song contains samples of "Din Daa Daa" by German dance singer George Kranz, and "Oh Yeah" by Swiss electronica band Yello. It debuted at number 98 on the Billboard Hot 100 and was featured prominently in the closing credits of The Hangover 2. It was the second such use of a Flo Rida song in the closing credits of a film from "The Hangover" franchise—the first was "Right Round", which also featured DJ Frank E and was used in the closing credits of The Hangover.

Robert Copsey of Digital Spy gave the song 3 stars out of 5 and stated "this follow-up [to "Club Can't Handle Me"] isn't quite as instant, nor is it as lyrically ear-snagging, but it's nice to see him having another crack at this singing malarkey [...] What's more, the electro-trance backdrop is so last summer, but it was worth bringing back for those "Mmm Da-Da"s alone".

A sequel to "Turn Around (5, 4, 3, 2, 1)" called "Turn Around, Pt. 2" with Pitbull's vocals, was released on iTunes on May 17, 2011. It was used in the end credits of The Hangover Part II.

In the United Kingdom, broadcasting regulator Ofcom received three viewer complaints after the video was broadcast on British music channel 4Music at approximately 1400 and 1800 UTC during December 2010 - January 2011, long before the 2100 watershed, "at the time when children are most likely to watch TV". The complainants claimed the video consisted of "extreme crudeness and filth" in a "sexist and offensive video which mostly comprises women in thong bikini bottoms acting in a pornographic manner". One complainant "was shocked to see women in thongs and bras and basically dry humping men in this video". In the opinion of one viewer, "this objectification of women at such an early time and on a channel that appeals to young people really concerns me".

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