This 1945 movie has a truly oddball premise: the great showman Flo Ziegfeld (played by William Powell) looks down from heaven, thinking about the good old days, when he imagines what it would be like to mount one more amazing theatrical review. And we see what he’s thinking, as one star after another steps up to show off: Fred Astaire, Judy Garland, Fanny Brice, Gene Kelly, Esther Williams, Lena Horne, and so on. And watch for Lucille Ball, six years before I Love Lucy, all glammed up as the whip-wielding “trainer” of a bevy of catty dancers.