Kings of Chaos are an international band featuring a core lineup of Guns N' Roses and Velvet Revolver members Matt Sorum, Duff McKagan, and Gilby Clarke as well as a revolving lineup of members of Def Leppard, Deep Purple, Aerosmith and more. The group plays songs from all of these bands, and other classic rock covers. To date, they have only recorded and released one song, "Never Before", on the Deep Purple tribute, Re-Machined: A Tribute to Deep Purple's Machine Head.