Les Brown and his orchestra perform the title song, while Doris Day sings in her first movie appearance.
It's one of thousands of soundies, short musical films created from the late 1930s through the middle of the 1940s to play on a device known as a Mills Panoram. You may think of them as video jukeboxes, or precursors to music videos. You could find them in bars, and a dime in the machine would bring you one of ten songs.
Most remarkably, this is Doris Day's first appearance int he movies. She was 19 when she made this, and had been singing with Brown's band for two years, long before her "first" picture for Warner Brothers.
