The Las Vegas scene was originally ommited from the shooting script because NBC executives thought it would be too expensive to build the set. So the film was shot and editied without it, and then screened for NBC executives to decide on whether or not to fund more money for the Vegas finish (which Cassandra really wanted). Ultimately, executives liked the film enough to fund the Las vegas scene. The scene was shot a month later in a warehouse in the San Fernando Valley, but some parts of the song and dance were cut from the final film.
Contributed by: Kat Fight
The reason Elvira's dress was cut that way and her hair was so long in back was to hide the scars the actress has on her neck and shoulders from burns she received when she was five years old.