Madison Square Garden (12-12-12: Concert For Sandy Relief)

This was a benefit concert aiding victims of Hurricane Sandy which caused widepread damage and killed 233 people across eight countries in October 2012. Paul McCartney was booked to perform a set and at the end he invited Dave Grohl, Krist Novoselic and Pat Smear on stage to play on a brand new song. It was unknown at the time that the song was recorded for the 2013 Sound City project. The event was simulcast live across the United States.

Bruce Springsteen and the E Street Band • Jon Bon Jovi • Roger Waters • Eddie Vedder • Bon Jovi • Eric Clapton • The Rolling Stones • Alicia Keys • The Who • Kanye West • Billy Joel • Chris Martin • Michael Stipe