The Beatles had four amazing singers, but the only one to make our list is John Lennon. He set the tone very early in the group's career. It was February of 1963 and the group had been recording tracks for their debut LP Please Please Me for 12 consecutive hours. By this point Lennon's voice was shredded, but he was talked into putting down vocals on "Twist And Shout." Before walking into the studio he gargled some milk and sucked on some throat lozenges. He then nailed the song in a single take. Needless to say, it was the beginning of 17 years of stunning work.