She came as her own severed left hand. Great costume.
Other celebrities came as different celebrities. Very meta.
- Zendaya came as Halle Berry (without the boobs).
- Lisa Rinna came as Kylie Jenner.
Every Heidi Klum Halloween Costume Through the Years: From Dominatrix to Medusa

Heidi Klum is an artist. She does not make costumes. She makes MASTERPIECES. She continues to top herself every time. She really puts in the work to create something absolutely original and unexpected. I am in awe of her.
Wow, her Halloween looks are incredible, often revolting. I guess it makes sense that a professional of looking her best is also very diligent about looking her absolute worst. This is great performance art.
I find it immensely amusing that one of the sponsors of her party is Butterfinger.