The greatest surprise performance at the 24-hour Live Earth was not Kanye West and John Mayer joining the Police on "Message in a Bottle." Hell, no. It was Spinal Tap (reunited) with some help from Metallica (they actually laugh) bringing down London's Wembley Stadium with hits like "Stonehenge" and "Big Bottom." Madonna's gypsy-hobo-punk performance -- fully choreographed -- of "La Isla Bonita" with Eugene and Serge from Gogol Bordello was also surprisingly excellent (watch......