Robert Plant . That's a little bit different because there...

Robert Plant . That's a little bit different because there was never fire in LED ZEPPELIN . It always had a note to it. He never screamed. With Robert Plant it was like, we still have to do music, we have to do notes. So, Robert Plant: Amazing vocalist, but he never did fire. He did heat and he did it really well. As well as Ozzy Osbourne and AC/DC and Bon Scott . This kinda heat thing has gone on for 20, 30 years.