The outfit that Cassie's mom buys for her and wants her to wear to school early in the film is the same exact outfit that Cassie's nemesis Priscilla is later wearing in school that day.
Papa John's Pizza co-promoted the movie with DVD coupon placement on their Pizza delivery boxes, and the restaurant chain's logo was also frequently shown in the movie.
Most of the masks and decorations seen in the opening of the film appear later in the Halloween Store that Cassie visits.
This was the first film to use the Universal Studios Family Productions logo, which is the same as the Universal Studios logo.
Emily Osment and Cody Linley both appeared in Hannah Montana (2006).