This movie reunites Caroline Rhea and Beth Broderick from "Sabrina The Teenage Witch".
When Kath says to Barb "What are you, a witch?", that's a nod to "Sabrina The Teenage Witch," the TV series which featured Beth Broderick and Caroline Rhea as witches and aunts to Sabrina (Melissa Joan Hart).
When the Shane's parents, Barbara and Nick, are walking down the sidewalk around minute 26, you'll see Julia Roberts.