Overton first formed a singing group with her sister Jean Swain and two college friends, Bix Brent and Pauli Skindlov in 1946.
Pauli left the group and was replaced by Ellie Decker, who had previously sung with The Meltones (Mel Tormé's quartet).
After Decker left the group to get married, she was replaced as lead singer by Marianne McCormick.
Ertel was married to Archie Bleyer, the owner of Cadence Records, the group's label.
After her husband Hall Overton died in 1972, she retired from show business and worked for Prentice-Hall Publishers as an editorial assistant.