It's not exactly clear what she's supposed to be. A humanoid cyborg? Some sort of Frankenstein's monster interpretation?
One thing we do know is that it took a hell of a lot of time and effort to get her into it.
The whole process took her 13 hours and a dedicated team of make-up artists, prosthetics fitters and many more.
The 46-year-old supermodel is no stranger to making a statement at the spookiest time of the year.
In fact, for the past 20 years she's really thrown herself into dressing up for her glitzy celebrity Halloween party. She's previously attended as Princess Fiona from Shrek and Jessica Rabbit.
None of those previous efforts are a patch on this one, though. It's revolting.
She had exposed organs, a brain covered by a glass dome, and weird machine-like things poking out of her back.
Oh, and she got ready for it all in front of a live audience.
Yep, the German swimwear model spent the hours leading up to the party in the window of an Amazon store showing everyone exactly how the process was done.
She announced the move by telling Entertainment Tonight: "This year is my 20th anniversary of my Halloween party, so I thought it would be fun for people to watch live when I get ready.
"On the 34th Street store of Amazon, I'm gonna be sitting in the window and people can just come by all day long and just watch the process if they're interested in seeing something like that."
She continued: "I thought it was fun to do a live art installation - that's what I just want to call it, because, for me, it's life art, what they do to me. People can hang out there all day and watch or come in the morning and then shop and come back in the afternoon.
"I'll still be there. Come and watch if you want!"
Well, the effect certainly wasn't lost on anyone who attended the party. Alongside her husband, musician Tom Kaulitz, she was definitely the star of the show.
That's no mean feat, given that her party was attended by celebs such as Black Panther's Lupita Nyong'o and Hollywood funnyman Neil Patrick Harris.