Sophie "Flo" Bert was a female vaudeville singer, whistler and comedienne who was active in the New York area in the Teens and 1920s. She billed herself as "4 foot, 9" of Ragtime". Her partner in vaudeville was her future husband Elmer Brendle a comedian who spoke with a fractured-Swedish accent and used the stage name El Brendel "the Yumpin' Yiminy". They had a hit act at the Winter Garden Theatre in 1920 called "Cinderella On Broadway". They married in 1924. Bert's recordings were the first Blues records released on the Paramount label. The records issued on the Famous label were released under the name of Alice Johnson.