Can't get enough mega-tours? Well, here's one more for you: Rockstar Mayhem Festival Coming to a parking lot or arena near you sometime this summer, this tour will feature an interesting, metal oriented lineup. Slipknot, Disturbed, DragonForce and Mastodon will perform on the mainstage. Other stages will host Sevendust, Airborne, Five Finger Death Punch, 36 Crazy Fists, Machine Head, Black Tide, Suicide Silence, the Red Chord and Walls Of Jericho. Don't forget your earplugs.