Ella Mae Morse, with Freddie Slack and His Orchestra, singing "Cow Cow Boogie".

Ella Mae Morse (September 12, 1924 – October 16, 1999), hired by Jimmy Dorsey when she was 14 years old. Dorsey believed she was 19, and when he was informed by the school board that he was now responsible for her care, he fired her.

In 1942, at the age of 17, she joined Freddie Slack's band, where she recorded "Cow Cow Boogie", Capitol Records' first gold single.

Ella Mae Morse, with Freddie Slack and His Orchestra, singing "Cow Cow Boogie".