After a late-night cup of coffee, vaudevillians Jo Hayden and Harry Palmer sit at a piano and work a song. Moments later, Jo realises she’s found exactly what she wasn’t looking for: a partner. And with Judy Garland as Jo and Gene Kelly as Harry, the partnership isn’t just ideal. It’s a film fan’s dream come true. Kelly debuts and Garland dazzles in this Busby Berkeley-directed…