Nick Holmes of "Paradise Lost"Tomi Joutsen of "Amorphis"Dave Gahan of "Depeche Mode"Vanessa-MaeKlaus Meine of "Scorpions"Bon JoviMike Patton of "Tomahawk"Spiros Antoniou of "Septic Flesh"Angela Gossow of "Arch Enemy"Tony LevinLali EspositoAdam "Nergal" Darski of "Behemoth"Ian Anderson of "Jethro Tull"Anthony Kiedis of "Red Hot Chili Peppers"