Listen to Sonata for Piano No. 16 in C Major, K. 545 (Sonata facile): I. Allegro online. Sonata for Piano No. 16 in C Major, K. 545 (Sonata facile): I. Allegro is an English language song and is sung by Carmen Piazzini. Sonata for Piano No. 16 in C Major, K. 545 (Sonata facile): I. Allegro, from the album The Best 250 Minutes of Mozart, was released in the year 2008. The duration of the song is 3:00. Download English songs online from JioSaavn.