"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.
"Rockabye" 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 lead single from their second studio album, What Is Love? (2018). The song is about hardships of single mothers and alludes to the nursery rhyme and lullaby, Rock-a-bye Baby. "Rockabye" is included on the deluxe edition of Anne-Marie's debut studio album, Speak Your Mind.
The song became 2016’s Christmas number one on December 23, 2016, beating the likes of Rag'n'Bone Man, Little Mix, Zara Larsson, Mariah Carey, Matt Terry and Louis Tomlinson & Steve Aoki to the Christmas number one spot. 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 28 other countries.