The season's two biggest stars, Siri and Santa Claus, team up in this amusing new Christmas commercial for the iPhone from TBWA\Media Arts Lab. It seems St. Nick has gone completely virtual—even the naughty-and-nice list is now in an email. Siri helps Santa throughout his evening, giving him directions to various homes, and relaying a nagging message from Mrs. Claus. At the end, Siri tells him he has about 3.7 billion appointments left for the night. Assuming he just started, that sounds about right.