TOM WAITS

Tom Waits has a remarkable history of Letterman appearances on Youtube. Here he plays "All The World Is Green." It's otherworldly music, real tough to narrate. But he has fantastic rapport with Dave. They really seem to get along.

Great sentence: "The children seem to like me as a driver."

Also: "When you're the opening act for large groups, sometimes you feel like a rectal thermometer."