Listen to Piano Concerto No. 21 in C Major, K. 467: III. Allegro vivace assai online. Piano Concerto No. 21 in C Major, K. 467: III. Allegro vivace assai is an English language song and is sung by Kalle Randalo. Piano Concerto No. 21 in C Major, K. 467: III. Allegro vivace assai, from the album Through the Years: Classical, was released in the year 2013. The duration of the song is 6:15. Download English songs online from JioSaavn.