sentences:  Bruce's radio debut came on "The Horn and Hardart Children's Hour".She sang on "Carton of Pleasure" and "The Henny Youngman Show".After a long career as a singer and in films, Bruce is probably best-remembered for her recurring role as the domineering and meddlesome Lillian "Mama" Carlson (mother of the station manager played by Gordon Jump) on CBS' "WKRP in Cincinnati".