As part of the finale Betty Grable leads a WAC (Women's Army Corps) drill team in some intricate maneuvers. It was decided to use a real WAC drill team, rather than actresses, for this sequence since they were already familiar with the routines.
Robert Sklar in his book 'Movie-Made America: A Cultural History of American Movies' states that Betty Grable's pinup picture was of value to GI morale during the Second World War. The famous picture of Betty in a swimsuit taken from the back with her looking back over her shoulder was done this way because her pregnancy was well advanced and it showed. The feeling was that a pregnant Grable was not as much of a pinup.
Betty Grable's dancing partner in the number "Once Too Often" is choreographer Hermes Pan, who did the choreography of this film.
"This Is It" (music by James V. Monaco, lyrics by Mack Gordon), sung by Betty Grable, was deleted from this movie. The song as filmed has been restored on the DVD from Fox Home Entertainment.
Angela Blue and Virginia Maple assisted Hermes Pan in working-out the choreography routines for this movie according to the 'Hollywood Reporter' of 10 June 1943. Betty Grable was then taught these "dance patterns".
This movie's closing credits feature an advertisement for the World War II USA war effort at the end of the credits roll. It states: "For Victory - U.S. War Bonds and Stamps - Buy yours in this theatre."
The 29 June 1943 'Hollywood Reporter' stated that Hermes Pan would be directing dance routines involving the Roller Skating Vanities of which Gloria Nord would star. However, Nord has no listed credit on this picture but apparently was an uncredited roller skating headliner. As such, she appeared as one of the skaters but did not "star" in the picture so to speak.
Eddie Hall got his bit as a hitch-hiking soldier in this film with help from his good friend, Martha Raye. Which most likely has nothing to do with the fact the Joe E. Brown's role name in this film was Eddie Hall.
Linda Darnell and Don Ameche were originally set to star team this movie in October 1942 but when the movie was announced as a musical, Darnell was replaced with Grable.
The 'Hollywood Reporter' once reported that actor James Engler tested for the leading male role opposite Betty Grable.
According to the 'Hollywood Reporter', the "midget comedy weight-lifters" Hercules and Dolly were listed as being as part of this movie's cast but they do not feature in the final film as it is.
According to an October 1942 edition of the 'Hollywood Reporter', Libbie Block, the author of the source story of which this film was based, was going to be doing the adaptation, but she did not actually work on this movie's screenplay according to this movie's credits and studio records.
Betty Grable's iconic pin-up photo was used in this movie, subsequently boosting its sales.
If you see credits elsewhere for Frank and/or Harry Condos for this film, it likely came from bad information. Frank Condos and Nick Condos were the Condos Brothers in live performances from 1929 to the mid-30s, including 1 film in 1932. Harry was listed in a 1930 Playbill, but that's likely a misprint since Frank (also in the Playbill) was dancing with Nick at the time, and they took their act to Europe. All film credits after 1932 for Condos Brothers refer to brothers Nick and Steve Condos.
By the rating insignia on their uniform's left shoulders, Dooley is an Aviation Machinist's Mate 2nd Class and his buddy is a Machinist's Mate 2nd Class.