2020 release. The Kingdom features some of the most potent songwriting of Rossdale's career, highlighted by the pummeling "Flowers on a Grave," as well as the noise hurricane "Quicksand" which finds him showcasing a vulnerability like rarely before. And then there's "Undone," a heart-wrenching ballad written in a burst of inspiration that he describes as "very pure" and untainted. In many ways, with Bush's new album, Rossdale is creating the type of music - and the world - he hopes to see.