Foo Fighters brought KISS‘ Gene Simmons onstage during a recent show in Las Vegas.After spotting a fan who bore a striking resemblance to the bassist, Dave Grohl then invited the real Simmons to come out from the side of the stage during their gig at Park MGM’s Dolby Live theatre.He then walked onstage wearing a face mask before he handed the Foo Fighters frontman a receipt and made his exit.As he left the stage Grohl said: “Can we just hear it one more time for Gene FUCKING Simmons,” before he