Elvis made this film in a deal with the floundering Allied Artists which saw him take a pay cut and not record any new material in exchange for 50% of the film's profits. The film was a big earner, which is credited in saving Allied Artists from bankruptcy.
While filming Elvis Presley gave his Sony video camera to director Norman Taurog. At the time those cameras were really rare in USA. Taurog liked the idea of it because with video camera he can shoot the scene himself and watch the scene before it goes to edit.