Diamonds Are a Girl's Best Friend
"Diamonds Are a Girl's Best Friend" is a jazz song written for the stage musical Gentlemen Prefer Blondes (1949), with music by Jule Styne and lyrics by Leo Robin. Carol Channing introduced the song in the original Broadway production, and Marilyn Monroe followed in the film version, performing it in a strapless, "now-iconic satin pink gown" in a rendition ranked by the American Film Institute the 12th best film song of the 20th century.
Source: Wikipedia — Diamonds Are a Girl's Best Friend (CC BY-SA 4.0)