Christmas Movies

I'm sure we're not alone in our annual December tradition to make sure we watch a certain list of Christmas movies at least once each throughout the season, right? So I have a question-- What are your MUST see Christmas movies every year? Our list is pretty long, but I just want to make sure we aren't missing any. Tell me what you have to watch every year to make your Christmas season complete. Maybe I'll add a few to our list and start even earlier next year. :-D