Sia, Charli XCX, Johnny Marr, and Albert Hammond Jr have all written songs for the forthcoming Blondie album, FACT reports. Blondie co-founder Chris Stein told Beats 1’s The Candy Shop that all of the tracks are finished and he and Debbie Harry invited a host of contemporary stars to co-write songs for the forthcoming as-yet-untitled LP. The album follows 2014’s Ghosts Of Download greatest hits compilation and will also feature Providence’s What Cheer? Bridgade as well as the Gregory Brothers.