 Eric Clapton, Keith Richards, Robert Cray, all of these people are on that documentary, and they're all coming to support Chuck Berry. Do you know one of the biggest things that Chuck Berry's known for, and a lot of people don't remember this, but it was in the movie, but it was a true part of it. Him and Jerry Lee Lewis were on tour together, and they were battling back and forth on who was going to open.