Listen to You Must Have Been a Beautiful Baby online. You Must Have Been a Beautiful Baby is an English language song and is sung by Bobby Darin. You Must Have Been a Beautiful Baby, from the album The Ultimate Pop & Rock Classics Box - The 250 Greatest Pop Rock Hits (More than 10 hours playing time - Best of Pop Rock - Top-10 Hits), was released in the year 2015. The duration of the song is 2:08. Download English songs online from JioSaavn.