Listen to Once Upon A Time ("16 Big Hits" Stereo Version) online. Once Upon A Time ("16 Big Hits" Stereo Version) is an English language song and is sung by Marvin Gaye and Mary Wells. Once Upon A Time ("16 Big Hits" Stereo Version), from the album Marvin Gaye '50' (International Version), was released in the year 2007. The duration of the song is 2:25. Download English songs online from JioSaavn.