Listen to Allegretto in A Major, Op. 60: No. 18. Allegretto online. Allegretto in A Major, Op. 60: No. 18. Allegretto is an English language song and is sung by Peter LaVine. Allegretto in A Major, Op. 60: No. 18. Allegretto, from the album Matteo Carcassi: Opus 60, was released in the year 2008. The duration of the song is 2:05. Download English songs online from JioSaavn.