In 2016, Gareth Jennings introduced audiences to koala Buster Moon and the rest of Calatonia’s animals in “Sing.” In that film, Buster puts on a singing competition for the ages to save his struggling venue and inspire some musical dreams in the process. READ MORE: ‘Sing 2’ Trailer: Buster Moon & Friends Have More Songs For Audiences In December Now, in “Sing 2,” the stakes are that much higher, as Buster and his friends take to Redshore City for a new show at the Crystal Tower Theater.