Sha Na Na, the popular 1950s revival group which has sold over 20 million records and starred in its own syndicated television series, was one of the performers at the 1969 Woodstock Music Festival. Twenty years later, Sha Na Na joined original fellow musicians for the "Woodstock: 20 Years After" concert held 3,000 miles away at Cal-State Dominguez Hills in Carson, California on August 20,1989.