London, June 28 : Singer Alice Cooper thinks actor Johnny Depp is a great guitarist and has invited him to play with his band whenever he can.Cooper, 63, was delighted when Depp, 48, agreed to perform with him at London's 100 Club, this Sunday."We've always given that kind of privilege to any great guitar player, like Brian May. He's in the same place as Brian May or Slash. He's a great guitarist