2019
Heidi Klum's costume was truly out of this world as a gory alien.
2019
While attending Paris Hilton's festivities the week before Halloween, it seemed the model took inspiration from the "fireworks" that new hubby Tom Kaulitz makes her feel.
2018
The supermodel transformed into everyone's favorite green princess, Fiona, from Shrek.
2017
The America's Got Talent judge had a hair-raising good time dressed up as the werewolf from Michael Jackson's "Thriller" music video.
2016
Instead of transforming into someone else, Klum opted to clone herself five times with the help of prosthetics and some fabulous wigs.
2015
Heidi who? This year, the former Project Runway host answered only to Jessica Rabbit.
2014
"They said, 'Are you really in there Mama?'" Klum told E! News, talking about her children's reaction to her metamorphosis into a butterfly.
2013
As for her kids' reactions to this elderly get-up, Klum told E! News, "The one time that I [looked] like me but older, they were scared."
2012
Heidi gave Elizabeth Taylor a run for her money in this chic Cleopatra costume.
2011
Klum's seen here with ex-husband Seal at a time when they were presumably quite a bit more bananas about one another.
2011
The former Victoria's Secret Angel looked like she hopped right out of an anatomy text book. Fun fact: This year, Klum held two parties. This costume debuted on Oct. 29 in Las Vegas.
2010
Klum is tall, but not that tall. She's actually wearing stilts to make this robot monstrosity more menacing.
2009
Little known fact about crows: a group of them is called a murder. Perhaps that's why the model chose the bird for her haunting costume.
2008
No, this isn't the Genie from Aladdin. It's actually the Hindu goddess of death and time, Kali.
2007
Klum's ferocious feline doesn't hold a creepy candle to the CGI in Cats.
2006
She's the apple of our eye in this costume inspired by the biblical tale of Eve and the forbidden fruit.
2005
Eat your heart out. Literally!
2004
Not all witches wear black, you know? In fact, this witch had a lacy costume that included a fake skeleton.
2003
Gladiator goddess or sci-fi dream? Either way, this vivacious look goes down as one of her best.
2002
For dressing as a cartoon figure, Klum makes a striking match for Betty Boop.
2001
In her second year hosting, Klum went full Lady Godiva—horse and all!
2000
Ah, simpler times. Klum's come a long way since this dominatrix look from her very first party!