A look back at the life and business of America’s oldest teenager: from his birth in 1929 in Bronxville, New York, working as a radio announce at his WRUN to launching American Bandstand as well as his "Psych-Out" movie with Jimi Hendrix, the American Music Awards and his annual New Year's Rockin' Eve -- and so much more -- Clark was one of the music industry's most successful and pioneering entrepreneurs.