#1 Denise Richards (who is, in real life, irritating and dumb) plays a character who is irritating and dumb. That way, you don't even have to pretend to like her.
#2 She dies in a tragic parade float accident.
#3 Kirstie Alley [who used to be a hot Vulcan who inspired ogling of her logical Vulcan ass, but quickly became unlikeable and annoying] plays a character who is unlikeable and annoying. That way, you don't even have to pretend to like her.
#4 Beauty pageants are irritating, dumb, unlikeable and annoying, and this movie makes fun of them.