Early in the movie, when Wyatt and Lex, the pilot of the private plane, are about to escape via parachute, Wyatt enters the cockpit and says: "Take the Chevy to the Levy." This is a sly, indirect music reference to Buddy Holly and his tragic early death in a small plane crash. The statement is a lyric from Don McLean's song, "American Pie", a song that expresses his sadness about the accident.
The "Bubbles" in the Mega Records recording studio change from white to yellow during the course of the film. Apparently the techs could not keep the material they were made out of to stay white, so they just went with it.
When Josie, Mel and Val are taken to the salon to get facials and other stuff done Mel is wearing yellowish eye shadow, then the salon people put pink eye shadow on her. It alternates between yellow and pink in subsequent shots.