If you still don't know what to be for Halloween, we've got 10 costume ideas inspired by pop culture that are relatively easy to create and ought to impress your friends. All it takes is rummaging through your closet, a little bit of shopping and some creativity.
1. The Joker
This year, no performance drew as much attention and acclaim as Heath Ledger's Joker. You'll need some white face paint, black eye shadow and temporary color hair spray. A purple suit works well if you happen to come across one in a vintage shop. Apply red lipstick with your eyes closed for that perfect maniacal touch.
* Bonus points if you get the voice down. "Wanna know how I got these scars?"
2. Sarah Palin
Just as there are three branches of our government, there are three essential pieces needed to pull off the perfect Sarah Palin: frameless glasses, a skirt suit and that frozen-yogurt-swirl hairdo. Throw on an American flag pin and you're in business.
* Bonus points if you have bangs or a caribou carcass in tow.
3. Michael Phelps
You either need to live in a warm climate or have enormous self-confidence to pull this one off. The musts for this costume are a Speedo, swim cap and goggles. Use some bronzer to define your muscles so you can proudly display eight gold medals across those pecs of yours.
* Bonus points if you bring along mom.
4. Miley Cyrus
The queen of Disney is a little less wholesome and a lot more fun than those Disney princesses. To create this costume, add extensions to your hair, squeeze into some tight jeans and throw on a sequined tank. Add a studded belt, cowboy boots, fingerless gloves and hoop earrings and you're ready to pop-rock.
* Bonus points if you find a guy to be your underwear model boyfriend.
5. Brangelina Baby
This costume works for just about any ethnicity. Dress in some hip duds and brag about your sexy, globe-trotting, good-will ambassador, multi-millionaire parents. If you can, sport a faux-hawk.
* Bonus points if you can find super attractive people to pose as your siblings.
6. Jonas Brothers
This one's for the boys. You'll have the girls flocking to you in your skinny jeans, skinny ties, skinny jackets, skinny vests ... well, you get the idea. Wanna be legit? Wear promise rings.
* Bonus points if one of you has a Glucose meter.
7. Blair Waldorf
Pull that private school uniform out of the closet and accessorize it to the hilt. We're talking ankle boots, knee highs, jewelry, a designer handbag and the always essential headband.
* Bonus points if you bring along attitude and a Chuck Bass look-a-like.
8. Rachel Zoe
The key to a Rachel Zoe costume is oversized everything. Giant sunglasses, exaggerated wide leg jeans, and a fluffy, faux fur vest ought to do the trick. Keep a Starbucks cup in your hand all night and you'll shut it down.
* Bonus points if you work "I die" and "bananas" into all of your conversations.
9. Kirk Lazarus
When channeling Robert Downey Jr. in Tropic Thunder, it's very, very important not to offend anyone. You'll need camouflage, face paint, a wig and lots of personality for this costume. Dressing as a dude playing a dude disguised as another dude isn't easy.
* Bonus points if you bust out an Australian accent half-way through the night.
10. Katy Perry
Vintage flair is the key to Katy Perry's style. If you happen to find a retro-inspired romper, then you're all set. Doll up your face with lots of colorful makeup and sport some girly accessories. It doesn't hurt to carry cherry chapstick in your purse.
* Bonus points if you actually kiss a girl.