7. Bob Dylan, 'Blowin' in the Wind'
In the early Sixties, most people knew "Blowin' in the Wind" long before they had heard the name Bob Dylan. Peter, Paul and Mary turned the tune into a hit in 1963, and everyone from Sam Cooke to the Doodletown Pipers followed. It's been translated into at least a dozen languages, featured in countless movies and played live over 1,200 times by Dylan alone. The songwriter has dropped almost all of his 1960s catalog from his current tour, but he still breaks out "Blowin' in the Wind" every night.