US actor Tim Robbins pays tribute during a concert in honor of folk music legend Pete Seeger at Madison Square Garden May 3, 2009 marking his 90th birthday. Proceeds from the show will go to Hudson River Sloop Clearwater, an organization founded by the singer 40 year ago to preserve and protect the Hudson River. Getty Images logo Getty Images 34 months ago

US actor Tim Robbins pays tribute during a concert in honor of folk music legend Pete Seeger at Madison Square Garden May 3, 2009 marking his 90th birthday. Proceeds from the show will go to Hudson River Sloop Clearwater, an organization founded by the singer 40 year ago to preserve and protect the Hudson River.