"Nasty" is a song by English recording artist Pixie Lott from her self-titled third studio album (2014). It was released on 7 March 2014 as the album's lead single by Mercury Records. The accompanying music video was filmed in November 2013 and directed by Bryan Barber. A second version featured British band The Vamps was released in the same day only in United Kingdom and Ireland.

"Nasty" was previously recorded by American singer Christina Aguilera in collaboration with CeeLo Green for inclusion on the soundtrack to the 2010 film Burlesque, which stars Aguilera and Cher, but it was ultimately scrapped from the official track listing due to legal issues concerning sample clearance.

"Nasty" was previously recorded by several artists, including Christina Aguilera, who recorded the song as a duet with CeeLo Green for her debut film project Burlesque (2010). However, their version did not make the final track listing due to legal issues concerning sample clearance. After Lott's legal team managed to clear all of the song's samples, the singer recorded her own version of the song and released it as the first single from her self-titled third studio album. In an interview with Metro, Lott explained, "A few other singers had recorded it and Christina was one of them so everyone wanted this song. When I heard other singers had done it I thought 'I need to get this!' It was a difficult song to get because there are so many old-school samples on it, like James Brown, that are hard to clear copyright on. But I got it and now it is my new single."

"Nasty" debuted on the UK Singles Chart at number nine, selling 30,812 copies in its first week.

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