Anita Belle Colton (October 18, 1919 – November 23, 2006), known professionally as Anita O’Day, was an American jazz singer and self proclaimed “song stylist” widely admired for her sense of rhythm and dynamics, and her early big band appearances that shattered the traditional image of the “girl singer”. Refusing to pander to any female stereotype, O’Day presented herself as a “hip” jazz musician, wearing a band jacket and skirt as opposed to an evening gown. She changed her surname from Colton to O’Day, pig Latin for “dough”, slang for money.

Anita Belle Colton (who later took the surname “O’Day”) was born to Irish parents, James and Gladys M. (née Gill) Colton in Kansas City, Missouri, and raised in Chicago, Illinois, during the Great Depression. Colton took the first chance to leave her unhappy home when, at age 14, she became a contestant in the popular Walk-a-thons as a dancer. She toured with the Walk-a-thons circuits for two years, occasionally being called upon to sing. In 1934, she began touring the Midwest as a marathon dance contestant.