Jack Johnson tells us exclusively that he will headline the Sydney, Australia leg of Live Earth, Al Gore’s seven-city, twenty-four-hour concert for the environment, appearing alongside Midnight Oil (reuniting for their first show in more than two years), Crowded House (who play their first gig in eleven years at Coachella later this month) and Silverchair. For surfer/rock star/environmental activist Johnson, who lives in Hawaii, deciding which leg of the event to play was obvious. “New York and Australia are about the same distance for me,” he says. “But Australia’s waves are a lot better, so that made the decision easy.” Johnson organized and will headline this weekend’s Kokua Festival in Honolulu, along with Eddie Vedder and Matt Costa. That event benefits a local environmental education group.