“Rockabye” is a song by British electronic group Clean Bandit, featuring English singer Anne-Marie as main vocalist together with Jamaican dancehall singer Sean Paul. It was released on 21 October 2016 and was their first single since Neil Amin-Smith’s departure from the group and it serves as the second single from their second studio album, What Is Love? (2018). The song is about hardships of single mothers and alludes to the nursery rhyme, Rock-a-bye Baby. “Rockabye” is included on the deluxe edition of Anne-Marie’s debut studio album, Speak Your Mind.
The song became the UK Christmas number one for 2016 on 23 December 2016. It is the first song in chart history to become Christmas number one after already being at the top of the charts for six weeks. In total, the song spent 9 weeks at the summit of the UK Singles Chart while also topping the charts in over 20 other countries.