With the passage of Rick Davies, I am reminded of one of my favorite mashups of all time. Mashups are invariably novelty tracks, and many (most) of them try too hard and don't really gel properly. Once a great while, one comes along where the whole is is greater than the sum of its parts (like a really good remix.) In 2006, the artist Arty Fufkin combined Gnarls Barkley, Supertramp and Rockwell. It's been in my record back in one form ever since.