26. "Oh Well"
"It represents my two extremes," Peter Green has said of this nearly nine-minute epic. "As wild as I can be, and my first sort of semiclassical attempt." Green insisted on releasing the song as a single over the objections of John McVie and Fleetwood, who, as legend has it, made a bet with the guitarist that the unorthodox track wouldn't chart. They lost: Split in two, with the bluesy freakout on Side One of a 45 and the flamenco guitar showcase on the other, "Oh Well" hit Number Two in the U.K., though the disagreement surrounding its release played a role in Green's departure from the band.