The Clash's London Calling is a smidge over 65 minutes long, making it one of those double albums that easily fits onto a single CD. They could have chopped off a few songs to fit it onto one record, but how could they possibly have made those cuts? Every song on London Calling is practically flawless, the perfect fusion of punk, reggae and rockabilly. "It was a point where everybody felt very comfortable being in the studio and recording," Clash bassist Paul Simonon recently told Rolling Stone. "But to add to that, we had somebody called [producer] Guy Stevens. He was really important, and he helped create a very positive atmosphere, even though he was a little crazy. But he was like a conductor. He brought out the best in everybody."