I love that song from the Shine A Light film! One of my favorites (I'm a big Buddy Guy fan...got to meet him once, but I'll save that story for another time).
I finally got the Muddy Waters' cd "King Bee" recently, that has the original version of Champagne & Reefer on it...what an awesome song! That's an album I've been wanting for 30 years, and its even better than I thought it would be!