Listen to You Must Have Been A Beautiful Baby (Single Version) online. You Must Have Been A Beautiful Baby (Single Version) is an English language song and is sung by Bing Crosby. You Must Have Been A Beautiful Baby (Single Version), from the album Forever Bing / Bing Crosby, was released in the year 2003. The duration of the song is 2:56. Download English songs online from JioSaavn.