"Work Bitch" is a song recorded by American singer Britney Spears for her eighth studio album, Britney Jean (2013). It was written by Spears, William "will.i.am" Adams, Otto "Knows" Jettman, Sebastian Ingrosso, Anthony Preston and Ruth-Anne Cunningham. The song's production was handled by Ingrosso, Jettman and Adams, while vocal production was done by Adams and Preston. "Work Bitch" made its premiere on September 15, 2013 on iHeartRadio and select Clear Channel radio stations and was released to digital retailers on September 17, 2013 by RCA Records as the lead single from the record alongside a clean version titled "Work Work".

"Work Bitch" is an electronic dance music (EDM) song containing mostly spoken lyrics, where lyrically Spears, in a faux British accent, repeatedly exhorts "bitches" to "get to work". The song received generally positive reviews from music critics, with reviewers calling it "amazing" and a "perfect club track". The song debuted and peaked at number twelve on the US Billboard Hot 100. Outside the United States, "Work Bitch" peaked within the top ten of the charts in several countries, including Canada, France and the United Kingdom.

An accompanying music video for "Work Bitch" was directed by Ben Mor and filmed in Malibu, California and released in October 2013. The music video has generated acclaim from critics and fans alike, who praised Spears's dancing and the visual cinematography. Spears traveled to the United Kingdom to promote the song on the British TV chat show Alan Carr: Chatty Man. The song was performed for the first time by Spears as the opening song from Spears' Las Vegas residency show Britney: Piece of Me (2013-17).

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