no joke...
Paul McCartney, EVH, Steven Tyler, Tom Hamilton, Paul Stanley, Gene Simmons, Bruce Kulick, Brian Johnson, Ozzy, Cheap Trick (original 4), Slash, Duff McKagen, Axl, Dave Navarro, Nikki Sixx, Dave Grohl, Zakk Wylde, Mike Inez, Nico McBrain, Josh Holmes, Gary Cherone, Don Dokken, etc...