8. Judy Garland - 'Over the Rainbow'
Judy Garland's performance of "Over the Rainbow" is the most iconic moment of the actress' long career, but it was nearly cut from the film. Studio chief Louis B. Mayer didn't like seeing the star sing in a barnyard, and he felt that it slowed down the picture. He was ultimately overruled, and the song became Garland's signature number. It was often performed in the encore section of her live show in the Fifties and Sixties, and as her life became more difficult toward the end, it seemed to take on a new, tragic meaning. She was a 17-year-old with her whole life in front of her when she sang it originally, but at some shows in the late Sixties, it came across almost as a cry for help. The version in her legendary Carnegie Hall concert of 1961 is particularly powerful.