Here's Paul McCarthy explaining the show, and exactly why it's important! You can watch the show tonight on many different tv channels, and streaming many places online.  CLICK HERE to find out where.

The lineup includes the Rolling Stones, Billy Joel, Paul McCartney, Bruce Springsteen and The E Street Band, Kanye West,  The Who and more. Producers revealed that Leonardo DiCaprio, Billy Crystal, Jake Gyllenhaal, Jon Stewart and Kristen Stewart will also appear.