Composer Harold Arlen (sitting, right) joins Judy Garland, Bert Lahr (far left), Ray Bolger (back row, left) and various executives for a Wizard of Oz sing-along in the NBC radio studio, circa 1939. Hulton Archive/Getty Images hide caption

Bert Lahr (far right), Ray Bolger (back row, right), Judy Garland (sitting, right), composer Harold Arlen (sitting left), and various MGM and music publishing executives sing songs from the 1939 film musical 'The Wizard of Oz' around a microphone in the NBC radio studio, circa 1939. Hulton Archive/Getty Images hide caption

Actress and singer Judy Garland wearing as Dorothy from director Victor Fleming's film, The Wizard of Oz. Wikimedia Commons hide caption