When You're Smiling
From Wikipedia, the free encyclopedia
"When You're Smiling" is a song by Shay, Fisher, and Goodwin, and made famous by Louis Armstrong, who recorded it at least three times, in 1929, 1932, and 1956.
Many other recordings exist, for example Studies in Swing No.3.
It was adopted by Leicester City F.C. as the club anthem, and can be heard at many of the team's games.