Crystal Lynn Bernard (born September 30, 1961) is an American singer-songwriter and actress, best known for her roles as Helen Chappel-Hackett on the sitcom Wings (1990–1997), Amy on It's a Living (1985–1989), and K.C. Cunningham on Happy Days (1983–1984). Bernard studied acting at Alley Theatre while growing up in Houston, Texas. She attended Spring High School, and continued her education at Baylor University, where she studied acting and international relations.