LONDON - JULY 07:  James Hetfield of Metallica performs on stage 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. Getty Images logo Getty Images 59 months ago

LONDON - JULY 07: James Hetfield of Metallica performs on stage 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.