It's a toss-up: I got "The Red Blues," from a film I dislike awfully, Silk Stockings, and the "Let's All Go to the Lobby" song from an era I never got to enjoy. I think there was a version for drive-ins (ah, dirty jammies and dangerous playgrounds).
Every morning — or just about — I wake up with some snatchlet of music in my head. Some days it may take well past lunch for the theme from "What's Happenin'?'" to work its way out and I figure why should I suffer alone?