The big names keep on RSVP'ing for the already star-studded 12.12.12 -- The Concert for Sandy Relief benefit show in New York City.  The latest to join the bill are Eric Clapton and Chris Martin of Coldplay. 

Tickets for the event, to be held December 12 at Madison Square Garden, went on sale today.  The lineup also includes Bon Jovi , The Who , Paul McCartney , Bruce Springsteen & the E Street Band , Billy Joel , Alicia Keys , Kanye West , Eddie Vedder , Roger Waters and Dave Grohl .

Proceeds from the concert, which is expected to be telecast live, will go to the Robin Hood Relief Fund, which provides money, material and know-how to local organizations that are helping the victims of the hurricane in regions hardest hit by the storm.

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