I'm partial to "Hell is for Children" and "We Live for Love" myself.
I've been listening to the Marilyn Manson cover of "This is Halloween". It's rad. I went to look it up at iTunes at first, mainly because I didn't even know our comp lab computers had iTunes. I know they didn't always have it, so when I discovered they finally did, I went exploring. It turns out if you want to buy it on iTunes, you have to buy the whole fucking "Nightmare Before Christmas" soundtrack album with all the original songs (which strangely you CAN buy separately) along with the crappy covers by Suck! at the Disco and Crap Out Boy. Now granted, I like the original songs, but I was really just interested in the Manson cover and the Fiona Apple one of "Sally's Song". If I want to hear Danny Elfman, I'll go pop in the movie. And I'm sure as hell not cool about buying those songs I don't even want.