1968, thirty years after “The Wizard of Oz”, Judy Garland (Renee Zellweger) is in London. As she prepares for her show, battles with management, charms musicians and reminisces with friends and adoring fans, her wit and warmth shine through. Featuring some of her best-known songs, the film celebrates the voice, the capacity for love, and the sheer pizzazz of “the world’s greatest entertainer”