Probably no one was in the recording studio more than Margie Singleton from 1955-1965. Her husband, Shelby, was head of A&R for Mercury Records and brought her onto sessions for his complete roster: Pop, R&B, and Country. She also made records herself, first for Starday, then Mercury and then United Artists before she and her second husband, Leon Ashley, began Ashley Records with a #1 hit, 'Laura (What's He Got That I Ain't Got)'. The untold story of Margie Singleton is here. She might just have