About Mae Questel
Mae Questel was an American actress. She was best known for providing the voices for the animated characters Betty Boop and Olive Oyl. Nevertheless, at the age of 17, Questel won a talent contest held at the RKO Fordham Theatre in the Bronx by imitating actress and singer Helen Kane. She made her debut with "I Eats Me Spinach" and essentially became the permanent voice until her hiatus to start a family in 1938. Questel's "Boop-boop-a-doop" routine, done in a style similar to the version Helen Kane created, while at the same time evoking something of the naughty allure of film star Clara Bow, was exactly what Fleischer wanted, and he hired Questel in 1931.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.