Beck appeared on this benefit show, which aired on MTV. It was 4.5 hours long and had an obscene number of stars perform. I believe the artists I've listed below were the ones with Beck at the Los Angeles venue.
"Side of the Road" was not aired, but "Everybody's Gotta Learn Sometime" was. You can watch them both at MTV
, and you can purchase a download of them both here
[people and bands
Guitar (Acoustic): Beck Hansen
Other Band: Audioslave, Brian Wilson, Common, Fiona Apple, Goo Goo Dolls, Good Charlotte, Jewel, John Mayer, Kanye West, Kelly Clarkson, Maroon 5, Melissa Etheridge, Nine Inch Nails, Red Hot Chili Peppers, The Game, The Radiators
Vocals: Beck Hansen