When we were kids, our favorite part of Halloween was candy. Now, tricks are the person you're trying to go home with at the end of the night, and treats are whatever mind-altering beverages are on hand at the night's ghoulish affair. Yup, adult Halloween is great, but despite the joy of not having a curfew, it's mostly due to the advent of the sexy costumes beautiful women of the world put so much effort into every year. Of course, we're not just talking about the girls we'll meet at this weekend's parties, but also the celebrity women who continue to step out in costumes that reinforce how hot they are, with a fantasy twist. Check out The 50 Hottest Celebrity Halloween Costumes and see why we can't enough of the spookiest, sexiest holiday.