"Domino" is a song by English singer-songwriter Jessie J from her debut studio album, Who You Are (2011). The song was released on 29 August 2011 as the fifth single from the album. Musically, "Domino" is an electropop and dance-pop song. Jessie J co-wrote "Domino" with its producers, Dr. Luke and Cirkut, with extra writing from Claude Kelly and Max Martin.

The song became Jessie J's second number-one single in the UK, following her previous collaboration with Dr. Luke and Claude Kelly titled "Price Tag" (2011). In the United States, the song peaked at number 6 on the Billboard Hot 100, becoming her most successful single in the US at the time (it has since been surpassed by "Bang Bang" in 2014). The song was nominated for the Brit Award for Best British Single at the 2013 BRIT Awards.

"Domino" was written by Lukasz "Dr. Luke" Gottwald, Claude Kelly, Max Martin, Henry "Cirkut" Walter, and Jessie J herself, while production was helmed by Dr. Luke and Cirkut. In July, 2011, Jessie J teased her fans via her official Twitter profile whilst posting 21-second clip of the song. "Domino" officially premiered on 16 August 2011 on Jessie J's official YouTube account. During an interview with MTV Buzzworthy, Jessie J further explained the concept behind the song, "People have heard 'Domino' and said 'it's nothing like you.' But I'm like well the album's really eclectic anyway, and I never go into the studio and say 'I wanna do another song that's like 'Price Tag' or another song like 'Do It Like a Dude'." In the same interview Jessie J unveiled that she often listened to Whitney Houston and Prince, so she came up with an idea to write a song that is "timeless, fun and uplifting". The song was released as lead single from the platinum edition of Jessie J's debut album Who You Are and fifth overall.

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