FILE - In this May 6, 1998, file photo, Dennis Greene, former lead singer for 50s revival group Sha Na Na, poses at the University of Oregon in Eugene, Ore., where he was a law professor. Greene died Saturday, Sept. 5, 2015, at a Columbus, Ohio, hospital after a brief illness, his nephew Edward Robinson said. He was 66. Greene performed with Sha Na Na at Woodstock in 1969 and sang with the group in the 1978 movie "Grease." (AP Photo/Jeff Barnard, File)