"Diamonds Are a Girl's Best Friend" is a jazz song introduced by Carol Channing in the original Broadway production of Gentlemen Prefer Blondes (1949), with music by Jule Styne and lyrics by Leo Robin.

Carol Elaine Channing was an American actress, comedian, singer and dancer who starred in Broadway and film musicals. Her characters usually had a fervent expressiveness and an easily identifiable voice, whether singing or for comedic effect.