Performed by singers like Ella Fitzgerald, Duke Ellington, Frank Sinatra, and more, the lighthearted lyrics of this familiar standard remind us that smiling is contagious. With plenty of jazz stylizations built into the melody and a Kirby Shaw scat bridge, this Michael Buble-inspired treatment would make a grand finale, encore, or signature song. "When you're smilin', the whole world smiles with you!"