Beginning at 7:30 PM ET tonight (Dec. 12), fans around the globe can tune in to stream 12-12-12: The Concert for Sandy Relief at Madison Square Garden in New York, with all proceeds benefiting the Robin Hood Relief Fund.

Although musicians from a wide range of genres are participating in the humanitarian effort, the rockers are definitely coming out in record numbers. Heavyweights like Dave Grohl, Eddie Vedder, Bruce Springsteen, the Rolling Stones, Roger Waters and the Who rank among the star-studded lineup, joining forces with pop and hip-hop acts like Alicia Keys and Kanye West.

One rumored performance that music fans won’t want to miss is Sir Paul McCartney playing with the surviving members of Nirvana, Dave Grohl and Krist Novoselic. However, instead of performing a Nirvana or Beatles tune, the all-star collaboration will apparently debut an all-new song for the special event. Novoselic calls the tune 'Helter Skelter' meets 'Scentless Apprentice.' Now, that we have to hear!

The stacked lineup for the charitable affair opens up a world of possible collaborations with some already confirmed performances to look forward to. The legendary Roger Waters of Pink Floyd fame has gone on record to say that he’ll be performing with Pearl Jam’s Eddie Vedder.

The historic event will bring together celebrities from actors and actresses to athletes and comedians to support the worthy cause, working the live phone-banks and taking donations from the general public to assist those in the Tri-State area impacted by superstorm Sandy. For more on '12-12-12,' visit the official website, and to donate, click on the button below:.

Note: The concert is over and the stream has ended. Go here for our coverage of the jam between the surviving Nirvana members & Paul McCartney.