Which actress became a defining figure in 1930s Hollywood thanks to her work in musicals?

Judy Garland is recognized as a defining figure in 1930s Hollywood, particularly due to her significant contributions to the musical genre. Her role in "The Wizard of Oz" (1939), where she played Dorothy and famously performed "Over the Rainbow," showcased her extraordinary vocal talent and ability to capture the audience's emotional response. Garland's performances not only highlighted her singing ability but also her acting skills, establishing her as a beloved figure in American cinema.

During this period, musicals were immensely popular, and Garland became synonymous with the genre, appearing in several other successful musical films such as "Babes in Arms" (1939) and "Strike Up the Band" (1940). Her youth, charm, and talent resonated with audiences, making her an iconic star of the decade and solidifying her legacy in the history of motion pictures.