LONDON – JULY 07: Spinal Tap’s Christopher Guest (R) poses with Harry Shearer (L) as the latter holds a marrow backstage during the Live Earth concert at Wembley Stadium on July 7, 2007 in London, England. Live Earth is a 24-hour, 7-continent series of concerts involving over a 100 music artists and 2 billion people aimed at raising awareness of global climate change. (Photo by Getty Images/Getty Images)