St. Louis Blues (retitled as Best of the Blues) is a 1939 American musical film directed by Raoul Walsh and set on a Mississippi River showboat. Though the song "St. Louis Blues" is performed, the film's plot is not based on the song. Artists appearing in the film include jazz singer Maxine Sullivan and composer/singer/actor Hoagy Carmichael. The film stars Dorothy Lamour, Lloyd Nolan, Tito Guízar, Jerome Cowan and Mary Parker. Lamour sings "I Go for That" by Matt Malneck, Jr. and Frank Loesser in the film, and it became a hit recording.