Listen to A Mighty Pretty Waltz online. A Mighty Pretty Waltz is an English language song and is sung by Bill Monroe and His Bluegrass Boys. A Mighty Pretty Waltz, from the album Masterpieces Presents Bill Monroe, Hits & Rarities, Vol. 1 (48 Country Songs), was released in the year 2014. The duration of the song is 2:43. Download English songs online from JioSaavn.