Halloween is only two and a half weeks away, so if you haven’t figured out your costume yet, better get cracking. Have you hit a wall? No worries—why not take your inspiration from one of last year’s best celebrity Halloween costumes? From Fergie and Josh Duhamel’s killer couples costume to Bette Midler’s super stylish ghost (what makes her so stylish? Click through to find out!), we’ve assembled 12 of the best getups sported by our favorite celebs during the 2012 Halloween season. Boo!