I've previously written on Hugh Laurie's amazing muscial talents. In fact, he's part of a band along with several other actors called Band From TV. But one of my favorite performances is this one from Jeeves and Wooster.
Jeeves (Stephen Fry) is preparing dinner for Bertie Wooster's (Hugh Laurie) prospective in-laws. Meanwhile, Bertie is trying his hand at Cab Calloway's "Minnie the Moocher" and the resulting conversation is quite hilarious.
You can buy Jeeves and Wooster at the A&E Store.