Many will find it hard to believe that Nancy Walker, the actress who is best remembered for her recurring roles on TV as Ada, Rhoda's Jewish mother on "The Mary Tyler Moore Show"; Rock Hudson's house-keeper on "Macmillan & Wife"; Rosie, the waitress who demonstrated Bounty paper towels on commercials as the "quicker picker upper", and as Angela, Sophia's estranged sister in "The Golden Girls", had actually made records and was a pretty good singer too.