Mildred Bailey (1907-1951) started as a vaudeville singer before she joined Paul Whiteman’s orchestra and she would develop into one of the best jazz singers of that time. In the 1930s she often performed on the radio and she married xylophone player Red Norvo, in whose orchestra she would also sing frequently. In addition to this she sang in other swing formations with famous soloists like pianist Teddy Wilson.
Sources:
Mildred Bailey: Squeeze Me (Affinity CDAFS 1013)
Red Norvo: Rock It For Me (HEP CD 1040)
Mildred Bailey: All Of Me (Definitive Records 11104