“1+1” is the third musical sequence of the 2021 film, Music, directed by Sia, and sung by Kate Hudson, who portrays the titular character’s sister, Kazu “Zu” Gamble.

The song is about loving someone and truly enjoying the time you have with them. The visual portray Zu having an energetic and fun dance sequence with Music and their neighbor, Ebo (portrayed by Leslie Odom Jr), that Music imagines during a small “pool party” that Zu had organized to “celebrate” something.