"Oath" is a song by English singer Cher Lloyd, featuring vocals from American rapper Becky G. The track was released on October 2, 2012, as the second single from the American version of Lloyd's debut studio album, Sticks and Stones, and the fourth single overall. "Oath", produced by Dr. Luke and Cirkut, was played for the first time on New York City radio station Z100 FM. The track was released as single in the United States, Canada, Australia and New Zealand only. "Oath" was not as successful as Lloyd's previous single, "Want U Back", in the United States, debuting at number 99, and peaking at number 73 on the Billboard Hot 100. The single was certified gold by the Recording Industry Association of America (RIAA) denoting sales of 500,000 in the country. In New Zealand, following the major success of "Want U Back", which reached number three, "Oath" made a respectable impact, peaking at number 13, becoming Lloyd's third consecutive Top 20 hit in that country.

"Oath" was originally written by Rebbeca Gomez but was brought to Cher Lloyd by Dr. Luke. It was later modified by songwriters Ammar Malik and Emily Wright, along with help from producers Dr. Luke, Cirkut and Robopop, for inclusion on Lloyd's second studio album, slated for release in 2013. However, when it was revealed that Lloyd's debut album, Sticks and Stones, was set to be revised for the American and Australian markets, Lloyd's producers decided to use the track as one of the release's lead singles, and Lloyd asked Gomez to appear on the track with her to sing one of the verses. Thus, "Oath" was released as the album's second single, following "Want U Back", in both the United States and Australia, and also featured on the version of the album released in Japan. The track itself premiered on New York City radio station Z100 FM on 7 September 2012. In promotion of the single, Lloyd performed it live solo on Today and Live! with Kelly and Michael and with Becky G on The X Factor USA, in front of her mentor and manager, Simon Cowell.

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