I know nothing about classical music, but woke up with what turns out to be Tchaikovsky's Piano Concerto No. 1 banging around my head. Took me a while to identify it and along the way found Victor Borge playing it.
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?