The INSIDER Summary:

• Heidi Klum is renowned for her elaborate Halloween costumes. 
• She finally revealed her 2016 look: An army of Heidi doppelgängers.

Heidi Klum goes all out for Halloween. She's arrived at her annual costume party dressed as chimpanzee, a glitter-drenched robot, and even a frighteningly realistic, 95-year-old version of herself. 

But her costume for this year might have taken the least preparation of all. That's because she showed up as herself —  plus five models dressed as identical Heidi clones.

"Are you seeing double, triple, quadruple, quintuple, sextuple?!" she wrote on Instagram before the reveal.

For hours Monday afternoon and night, she teased her followers with sneak peeks of the look. Fans endured the torturous wait as the costume took shape (but not without a healthy dose of complaining in the comments section). By the time photos of Klum in costume surfaced, Halloween was already over on the East Coast. 

Here's a look at the tantalizing series of hints that preceded the final reveal:

It started with a video of a bare-faced Klum around 2:30 pm. 

Then she prepped her hair. 

Next, she revealed some type of prosthetic being applied to one of the model's faces.

Then, one of Klum's prosthetic artists promised that this would be "the best" costume she's ever worn.

But she sounded a little concerned when she asked her makeup artist whether or not the costume would be pretty. Klum was tring to throw us off her costume's scent!

More vague clues!

What could all these boots be for?! Six different Heidis, apparently. 

Are there multiple people involved in this costume?!

Yes, definitely a group outfit.

She's inside a giant crate?!

Finally, we got the big reveal: A group of 6 Heidi Klum doppelgängers (the real one's in the center).

This is the first time that Klum has arrived in a group costume since she began her annual Halloween party 17 years ago. The look is classic Klum-on-Halloween: Just like her Jessica Rabbit costume last year, it's little sexy, a little creepy, and definitely jaw-dropping.

The real genius is that Klum herself didn't even dress up — she just wore some makeup and a leotard. Instead, she made a costume by dressing up other people and placing them nearby her. That's next-level costume design.

In the end, Heidi Klum once again raised the bar for Halloween revelers worldwide. What will she think of next year?

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