Listen to Mary's Boy Child - Harry Belafonte online. Mary's Boy Child - Harry Belafonte is an English language song and is sung by Number 1 Hits of the 1950s. Mary's Boy Child - Harry Belafonte, from the album Timeless Hits of the 50S, was released in the year 2014. The duration of the song is 2:59. Download English songs online from JioSaavn.