Listen to The Christmas Tree, Op. 21: Waltz online. The Christmas Tree, Op. 21: Waltz is an Instrumental language song and is sung by Boris Khaikin and Bolshoi Theatre Orchestra. The Christmas Tree, Op. 21: Waltz, from the album Russian Christmas, was released in the year 2007. The duration of the song is 4:39. Download Instrumental songs online from JioSaavn.