 The musical that this film is based on was originally entitled "Away  We Go!" The title was changed to "Oklahoma!" after the popularity of  that song with the plays initial audiences. It was the first  Broadway musical in which every single song had a direct relation to  the plot, and in which there were none that were simply musical  interludes. (Even "Show Boat", which actually is the first Broadway  musical in which most of the songs have a direct relation to the  plot, originally had one or two numbers which were simply thrown in  so that something could be going on while the scenery was being  changed, or even to suit certain cast members who perforned  "specialties" in the original 1927 production. These specialties  were deleted from later productions of "Show Boat".)