OK, so the definitive earworm from The Nightmare Before Christmas is "This Is Halloween," but there are some fresh holiday songs to bop to all December long, thanks to the genius of singer, composer, and voice actor Danny Elfman. The pulse-racing "What's This?" celebrates the season's greetings by noting all of the weird, wondrous markers of Christmas. It's also very worth listening to the bonus cover tracks, such as Fiona Apple's "Sally's Song" and Panic! at the Disco's "This Is Halloween."