“When You’re Smiling & Smile Darn You Smile”
About this song
“When You’re Smiling” is a song by Larry Shay, Mark Fisher, and Joe Goodwin, and made famous by Louis Armstrong, who recorded it at least three times, in 1929, 1932, and 1956. Duke Ellington also recorded it several times earlier in his career.
Smile, Darn Ya, Smile! is a Merrie Melodies cartoon short, and also the title of the song performed in the cartoon.