Heidi Klum is the queen of Halloween. Her elaborate looks for her annual costume party just keep getting better.
It's not clear exactly what Martha dressed as in 2009 (tree? wood nymph?), but you can tell she's better at papier-mâché than you'll ever be.
Actress-model Emily Ratajkowski seriously committed to this Marge Simpson costume last Halloween.
On Halloween 2011, singer Fergie looked like she stepped right off the set of "Toddlers and Tiaras."
Katie Couric was almost unrecognizable as Dolly Parton in 2013.
Leave it to Sia to wear an Easter bunny costume on Halloween 2009.
Back in 2011, model Amber Rose played off her last name, dressing up as Guns N' Roses guitarist Axl Rose.
Singer Mariah Carey is another famous Halloween party hostess.
Last October, Model Gigi Hadid went for the classic bad Sandy from "Grease."
That's a giant Pixy Stick in Chrissy Teigen's hand...maybe she was the sugarplum fairy for Halloween 2011?
Just 'cause he can't see, doesn't mean he can't dress up. Stevie Wonder was a skeleton in 2011.
Kim Kardashian was Little Red Riding Hood in 2010.
Bette Midler hosts a Halloween benefit gala every year, and her costumes never disappoint.
Ice T and Coco often opt for couple's costumes. Here they are in 2010 as Dr. F. Stein (get it?) and a nurse.
Actor Kyle McLachlan sported some gruesome golf makeup in 2007.
In 2013, Dascha Polanco (of "Orange is the New Black") channeled the creepy ballerina from Black Swan.
Perez Hilton made a pretty convincing Miley Cyrus in 2013.
In 2004, a young Anne Hathaway dressed as Cleopatra.
Singer Ashanti's last two costumes (a belly dancer and a smurf) show ultimate Halloween dedication.
Actor Jason Biggs was an adorable Dorothy in 2005.
Joe Jonas dressed as Derek Zoolander in 2014.
TV personality Bethenny Frankel looked glamorous as Marilyn Monroe in 2013.
Technically they're wearing normal clothes, but Jennifer Lopez and then-boyfriend Casper Smart had stunning skeleton makeup in 2015.
Actress Michelle Trachtenberg broke out serious face-painting skills for Halloween 2011 and 2014.
Halloween spirit runs in the Jonas family: Here's Nick as the Hamburglar in 2015.
