Eric Clapton and Coldplay’s Chris Martin have joined the lineup for the 12-12-12 benefit at New York’s Madison Square Garden. They join an already stacked lineup that includes Paul McCartney, Bruce Springsteen & the E Street Band, Roger Waters, Eddie Vedder, Jon Bon Jovi, Dave Grohl, Billy Joel, Alicia Keys, Kanye West and The Who. All proceeds from the December 12 show will aid the victims of Hurricane Sandy. Clapton will appear at MSG in April when he brings his Crossroads Guitar Festival to the arena.