Listen to Diamonds Are a Girl's Best Friend (From "Gentlemen Prefer Blondes'') online. Diamonds Are a Girl's Best Friend (From "Gentlemen Prefer Blondes'') is an English language song and is sung by Marilyn Monroe. Diamonds Are a Girl's Best Friend (From "Gentlemen Prefer Blondes''), from the album The Actors Sings... (39 Songs), was released in the year 2016. The duration of the song is 3:29. Download English songs online from JioSaavn.