Blue Skies (1946)
Blue Skies is a 1946 American musical comedy film directed by Stuart Heisler and starring Bing Crosby, Fred Astaire, and Joan Caulfield. Based on a story by Irving Berlin, the film is about a dancer who loves a showgirl who loves a compulsive nightclub-opener who can't stay committed to anything in life for very long. Produced by Sol C. Siegel, Blue Skies was filmed in Technicolor and released by Paramount Pictures. The music and lyrics and story were written by Irving Berlin, with most of the songs recycled from earlier works.
More at Wikipedia.