Heidi Klum Has Been Working on Her Halloween Costume 'for Months': 'Don't Want to Let Anyone Down' (Exclusive)

The model has previously dressed up as a peacock, werewolf and a worm for the annual holiday

Heidi Klum is opening up about her Halloween plans!

Speaking exclusively to PEOPLE at the America’s Got TalentSeason 19 Finale 1 on Tuesday, Sept. 17,Klum, 51, revealed that she’s been working on her costume “for months already.”

“Because molds need to be made,” she tells PEOPLE. “Prosthetics need to be made, fittings have to be had.”

“So yeah, there goes a lot into it because I wanted to be so spectacular that this is not something I can just throw together overnight," she adds.

She continues of the pressure she feels to deliver on her annual outfit, "It takes a long time. It takes a lot of planning. And also then when I do the reveal, I want to have a special reveal because I know I have so many fans and those particular Halloween fans are people who love also dressing up and coming up with amazing things.”

"So I feel like they're really looking at what I'm doing and I don't want to let anyone down, so I'm always giving everything,” she says.

Related: Heidi Klum Shares Rare Family Photos as She Celebrates Son Henry on His 19th Birthday: 'My Pride and Joy'

Since the early 2000s, the supermodel has become known for wearing extravagant Halloween costumes to her iconic N.Y.C. Halloween party.

Last year, the AGT judge dressed up as a peacock for her bash at Marquee Nightclub in N.Y.C., which was sponsored by Patrón El Alto Tequila and Cirque du Soleil. Backup artists also followed her as part of the costume and helped form part of the peacock's wings.

“I wanted to do a costume with many, many people," she told PEOPLE ahead of the spooky holiday. "I wanted to have a bunch of people and we all become one thing. And for me, in my mind, that one thing was the peacock."

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Related: See Heidi Klum, Stephen Baldwin, Tamera Mowry and More Celebrities Party for PEOPLE's 50th Birthday in L.A.

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The year before, Klum dressed up as a worm to her annual party while her husband Tom Kaulitz accompanied her as a fisherman with a bloody eye.

Klum’s other costumes have included a zombie mom, a werewolf, an alien zombie, Jessica Rabbit, Princess Fiona from Shrek and even clones of herself.

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