Pet Sematery - either by The Ramones or The Creepshow, both are good
Halloween - either by The Misfits or The Creepshow
Pretty much anything by The Creepshow, especially off their first album 'Sell Your Soul', it all has a good halloween theme and feel to it. The two I listed here are just covers, even though they're awesome
O Death - from the Supernatural soundtrack
Ghost Opera - Kamelot (look up other stuff by them, they're orchestral metal)
If you like Evanescence, you'll like Within Temptation even better
You'll probably also like Nightwish and Tarja Turunen's solo music
Costume Con - Kili in a dress
Atomic Lollipop - Come visit me at the Make-Your-Own-Button free craft booth!
Polar Chill - check out my costume DIY panel and workshop
FanExpo - Iron Man Mark VII version 2, Pacific Rim Jaeger pilot?
FanExpo - fem!Iron Man Mark VII - The Iron Man Armor Project
Atomic Lollipop - Vanellope von Schweetz; raver!Sailor Mars