Christina Fougnie had to go to "brat school" to learn how to play the part of Max.
The classroom scene where Max gets in trouble was filmed at the real school that actress Christina Fougnie attends in Louisville, KY. The scene was shot on a Sunday.
Second unit/B-roll shooting began in December before casting and final script were even completed. The filmmakers needed to capture the Christmas-decorated Kentucky cities of Louisville, Lexington, and Bowling Green, as well as Jeffersonville, Indiana, before the decorations came down in January.
When Max and Stacy are flipping channels, one of the movies they pass is entitled 'Sarah'; 'Sarah' was the original working title for Clancy (2009), which also starred Christina Fougnie.
The tune for the opening song, "Jingle Jingle Mr. Kringle" was actually 'recycled' from a song called, "Arrivederci, Mama Mia' which was supposed to appear in the film La sposa (2004), but did not make the final cut.