The Big Store is an American comedy film released in 1941 with Groucho, Chico and Harpo wreaking havoc in a large department store. Groucho appears as private detective Wolf J. Flywheel. The music of the piano duet is “Mamãe Eu Quero” (Mom, I want it), a very famous Brazilian song composed in 1937 by Vicente Paiva and Jararaca,