Why do you guys keep posting image links THAT DON'T WORK?
Also, Andy, I recommend:
1) Halloween series, of course. It's classic for this time of year
2) The Thing (older version)
3) Quarantine
4) Silent Hill
5) Paranormal Activity
6) Nightmare Before Christmas (ALSO CLASSIC, though not "scary")
7) Doom (because WHY NOT?)
8) 28 Days of Night
9) Dawn of the Dead
10) SHAUN of the Dead
ROBOSPROG, THAT'S NOT HALLOWEEN. THIS IS HALLOWEEN:
This girl. Right here. This is how Halloween SHOULD be. If there was a party, and all girls dressed like you provided, I'd either look for the one that looks like what I listed, or leave. HALLOWEEN IS FOR SCARY, NOT SLUTS.