When you're scrambling for a last minute Halloween costume, the worst thing to do is join in on a scavenger hunt through a crowded costume store. Instead of going through that nightmare, get creative and use the clothes in your closet. From the iconic Karl Lagerfeld to the ladies of Mad Men, we've rounded up a bunch of costume ideas. So, look no further than your closet (and our slideshow) for the quickest costumes you can wear this week.
[Photo via @latexfleurs]