Slash; Lenny Kravitz , Chester Bennington of Linkin Park , Steve Isaacs formerly of Skycycle and The Panic Channel , Royston Langdon of Spacehog , Donovan Leitch of Camp Freddy, Ours singer Jimmy Gnecco and Scars on Broadway guitarist Franky Perez , as well as previous auditonee Sebastian Bach. Slipknot and Stone