Listen to Diamonds Are a Girl's Best Friend online. Diamonds Are a Girl's Best Friend is an English language song and is sung by Marilyn Monroe. Diamonds Are a Girl's Best Friend, from the album 60 Sultry Songs of Seduction Sung by Sophisticated and Sexy Sirens (Classic Love Songs Sung by Female Singers), was released in the year 2012. The duration of the song is 3:32. Download English songs online from JioSaavn.