Lucille Ball's singing was dubbed by Annette Warren, who also dubbed Ball in Los nuevos ricos (1950).
The opening narration is read by famous New York columnist Walter Winchell. Winchell was the basis for Damon Runyon's character Waldo Winchester.
A theater marquee for the The Marx Brothers' Una noche en la opera (1935) can be seen when Sorrowful is riding Dreamy Joe down Broadway. This places the events of the movie in 1935.