The Best and Worst Celebrity Halloween Costumes

We have to hand it to Katie Couric. We don’t know if it’s the toupee or the smug expression, but she makes a great Donald Trump.

There are few words that come to mind when thinking of Jason Biggs as Dorothy from the Wizard of Oz. We’re a fan of the red sneakers, but not much else.

Reality television isn’t saving the world anytime soon, but we must say, Kim Kardashian does resemble most famous female super hero.

Aaron Carter, what were you thinking? You may have dated Hilary Duff and Lindsay Lohan, but that doesn’t mean you should dress up like a teenage pimp.

Anne Hathaway looks exquisite as an elegant Egyptian goddess. And we’re lovin’ the headdress!

We just don’t get this look. Is Angie Harmon trying to be a Scotsman, a punk rocker, or an abusive girlfriend?

Take it down a notch, Aubrey O'Day. Even the hottest football players don’t wear metallic underwear.

Mariah Carey shows some skin in her rendition of The Little Mermaid. Hey, if you've got it, flaunt it!

As the Hindu goddess Kali, we applaud Heidi Klum for her audacity and attention to detail.

The Davis brothers may be oil heirs, but they look far from royal as Paris and Nicky Hilton.

Ready to ruffle some feathers, Audrina Patridge pulls off the peacock look with style.

Cher + Cleopatra = One scary Halloween costume.

Hayley Keenan’s monarch butterfly costume is where homemade meets high fashion. So original!

Mariah Carey turns on the heat with her firefighter costume. But sex appeal aside, the bra-and-underwear Halloween approach is kind of a cop-out.

When it comes to Jamie Lee Curtis in leopard print, there is such a thing as too much material. But hey, she does resemble a life size jungle cat.

Karolina Kurkova looks like she cat walked out of the ‘20s and onto the runway in her sultry flapper ensemble.

Joey Fatone is confused, and so are we.

Only Heidi Klum would arrive at her Halloween party riding a horse. We're not sure about her costume, but those long locks go nicely with the mane.

How old are you, Kelly Bensimon? You’re certainly in shape, but is your costume for Halloween or a jungle frat party?

Michelle Trachtenburg is a gorgeous Snow White, but we don't quite get Lydia Hearst's costume - a toga-wearing vampire with butterfly wings?

Martha Stewart lets down her hair and squeezes into a wet suit. Our only question is, did she do this willingly?

This is a great PG effort at Betty Boop, but if she was going for more coverage, maybe Mischa Barton shouldn't have picked the cartoon character used in 1920's eight-pagers.

Only a few months after her time spent in prison, Paris Hilton shows her sense of humor on Halloween.

Heidi Klum gives new meaning to the word vampire. If you choose a classic costume, might as well go all out!