No. 5 in A flat major, Op. 42

Whose song is No. 5 in A flat major, Op. 42?

Artist Album
Chopin
Waltzes Nos 1-19
Chopin, Frederic - Samson Francois
Chopin 14 vales, 4 impromptus, 4 ballades, 4 scherzoes - Disc 1