Listen to Medley: We Wish You a Merry Christmas / O Christmas Tree online. Medley: We Wish You a Merry Christmas / O Christmas Tree is an English language song and is sung by Santa Claus Band. Medley: We Wish You a Merry Christmas / O Christmas Tree, from the album Christmas Tree: Best Christmas Songs of All Time (Merry Christmas), was released in the year 2014. The duration of the song is 4:47. Download English songs online from JioSaavn.