Sing You Sinners is a 1938 American musical comedy film directed by Wesley Ruggles and starring Bing Crosby, Fred MacMurray, Ellen Drew, and Donald O'Connor. Written by Claude Binyon, the film is about three singing brothers who go to California to find their fortune. Initially the film was to be titled "The Unholy Beebes" and then "Harmony for Three" before finishing with "Sing You Sinners". Filming took place in April/May 1938 in Hollywood. Race track scenes were filmed at the Pomona Fairgrounds and at Santa Anita using two dozen of Crosby's horses. Sing You Sinners was premiered on August 5, 1938 at the Del Mar racetrack with the New York premiere taking place on August 16.

The film introduced the two Crosby hit songs "Small Fry" and "I've Got a Pocketful of Dreams". Crosby recorded the former title as a duet with Johnny Mercer for Decca Records. However, it does not include the song Sing You Sinners.