Pete Seeger's 90th Birthday

A star-studded medley of 40 musical guests played tribute to Pete Seeger at a benefit concert for the legendary folk singer's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. Here, from left, Steve Earle, Pete Seeger and Tao Rodr'guez-Seeger perform .

Oscar-winning actor Tim Robbins speaks at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. The concert is a benefit for the Hudson River Sloop Clearwater, created by Pete Seeger to preserve and protect the Hudson River.

Singer John Mellencamp performs "If I Had A Hammer (The Hammer Song)" at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. He said it was the first song he learned how to play on guitar.

Rocker Bruce Springsteen performs at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. Several years ago, Springsteen released a CD devoted to Seeger songs.

Singer Arlo Guthrie performs at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. The son of folk legend Woody Guthrie, he was joined by the Preservation Hall Jazz Band for "Oh Mary Don't You Weep."

Singer Richie Havens makes an appearance in the press room at the Clearwater Concert celebrating Pete Seeger's 90th birthday at Madison Square Garden, in New York, on Sunday, May 3, 2009.

Musician Joan Baez performs at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009 in New York. The concert is a benefit for the Hudson River Sloop Clearwater, created by Pete Seeger to preserve and protect the Hudson River.

Singer-songwriter Pete Seeger encourages audience participation at the benefit concert celebrating his 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Singer songwriter Pete Seeger, center, and friends perform at the conclusion of a benefit concert celebrating his 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

From left, musicians Billy Bragg, Tom Morello, Patti Scialfa and Bruce Springsteen perform at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Singer Dave Matthews performs "Whiskey Rye Whiskey" at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York. He said the first concert his mother took him to was a Pete Seeger concert.

Singer Emmylou Harris makes an appearance in the press room at the Clearwater Concert celebrating Pete Seeger's 90th birthday at Madison Square Garden, in New York, on Sunday, May 3, 2009.

Musicians John Mellencamp, left, and Pete Seeger make an appearance in the press room at the Clearwater Concert celebrating Pete Seeger's 90th birthday at Madison Square Garden, in New York, on Sunday, May 3, 2009.

Singer Richie Havens performs at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Singer Billy Bragg performs at the Clearwater Concert celebrating Pete Seeger's 90th birthday at Madison Square Garden, in New York, on Sunday, May 3, 2009.

Actor Tim Robbins, right, and his son, Miles Robbins, perform at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Actress Ruby Dee and musician Bela Fleck perform at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Bruce Cockburn, left, and Ani DiFranco perform at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

From left, musicians Arlo Guthrie, Bruce Springsteen and Tom Morello perform at a benefit concert celebrating Pete Seeger's 90th birthday at Madison Square Garden on Sunday, May 3, 2009, in New York.

Singer-songwriter Pete Seeger performs at the benefit concert celebrating his 90th birthday at Madison Square Garden on Sunday, May 3, 2009 in New York.