The role of the female bubble gum singer who was in the closet was inspired by Lesley Gore who actually helped compose some of the music in the movie.
According to director Allison Anders (on her commentary sound track for the DVD) it was a first for a movie to show a woman's waters breaking (in the recording studio scene - however such an event had already been depicted as early as Cinderella Liberty (1973)) as well as having her sweater getting wet because it was time to breastfeed her baby. Allison Anders had also asked for "child care" to be listed in the end credits.
Most of the '60s-style hair-dos in this movie were wigs. However, the Lesley Gore inspired character Kelly Porter's incredibly styled hair was in fact actor Bridget Fonda's own hair.
Boyd Rice played a character loosely based on Lee Hazlewood, but the character was cut from the final edit of the film.