Some people think Fountains of Wayne are a novelty band, and in some ways, they are. What I really like about them are their smart, catchy pop songs. They've got enough hooks to last days and days. In any case, both of these are pretty darn catchy with a healthy dose of fun. You can find the tracks on FoW's "Out-of-State Plates" compilation or on the original single (pictured) if you have the time/cash to track it down.
Fountains of Wayne > I Want An Alien For Christmas
Fountains of Wayne > The Man In The Santa Suit