Tonight, some of music's biggest stars are getting together to lend a hand to victims of Hurricane Sandy.
It's been more than a month since the devastating storm hit the northeast coast.
Money raised at tonight's "12-12-12 concert" at New York's Madison Square Garden will go to the Robin Hood relief fund.
It will feature performances from Bon Jovi, the Rolling Stones, Bruce Springsteen, Billy Joel, Paul McCartney and others.
Producers say they've already raised $30 million.