Marilyn Monroe was promised the lead role in The Seven Year Itch (1955) if she appeared in this film to boost its box-office potential. The role of Vicky was written especially for this purpose, and songs such as "Heatwave", originally intended for Ethel Merman, were assigned to her.
Donald O'Connor had separated from his wife of ten years. She and Dan Dailey, who played O'Connor's father, were dating during the shooting of the film. After filming wrapped, the O'Connors divorced and shortly thereafter Gwen Carter and Dan Dailey married.
During the making of the CD, it was discovered that half the "Play a Simple Melody" duet was deteriorated beyond repair, with the result that Ethel Merman is credited on the CD label with singing with a "temporary vocal double for Dan Dailey". However, the non-stereo version was intact and was added to the CD as well - they are tracks Fourteen and Fifteen.
Irving Berlin loved Ethel Merman, having first worked with her in a previous cavalcade of his songs, Alexander's Ragtime Band (1938). After that film, Berlin told her that he was so impressed with her talent that he promised to work with her again. He kept that promise and wrote two Broadway shows especially for her: "Annie Get Your Gun" in 1946 and "Call Me Madam" in 1950, the latter of which also starred Merman in the film adaptation: Call Me Madam (1953). The song "There's No Business Like Show Business" is from "Annie Get Your Gun".
Marilyn Monroe's voice on the Decca soundtrack album "There's No Business Like Show Business" was replaced by singer Dolores Gray because Monroe's voice was under contract to another record company that would not release the rights for use on the album.