"Rockabye" is a popular song by the British electronic music group Clean Bandit. It was released on October 21, 2016, and is written in the key of A minor. The song features vocals by Anne-Marie and Sean Paul. It was composed by Jack Patterson, Grace Chatto, and Sean Paul Henriques. "Rockabye" reached number one on the UK Singles Chart and stayed in the top spot for nine consecutive weeks. Notably, it became the first UK Christmas number one single by a group in over a decade. The song includes elements of dancehall and tropical house, with a catchy and upbeat melody.