"Started working on my Halloween costume! #HeidisHalloween" tweeted the model on Monday, revealing a photograph of her looking far from her beautiful blonde bombshell self, her head and neck instead covered in plaster for a possible prosthetic bust.
A whole three months ahead of this year's celebration, Heidi, who never ceases to amaze when it comes to her fancy dress for the spookiest night of the year, has revealed that this Halloween's costume will be as spectacular and over-the-top as ever.
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Previous costumes have included a head-to-toe monkey costume, an autopsy, in which Heidi was made to look like a skinless human body, and was wheeled into the Las Vegas party covered with a blood-spattered sheet on a trolley, the many-armed goddess Kali, and Cat Woman.
The America's Got Talent judge will undoubtedly go all out this October, as last year's highly-anticipated annual bash had to be cancelled due to Hurricane Sandy.
Admitting that she "didn't think it was right" to celebrate her favourite holiday when so many people had been devastated by the storm, she rescheduled the event, tweeting, "Hope you & your loved ones are safe after the storm. Cancelling my Halloween party...postponing to a haunted Christmas."
Attached was a snap of Heidi wrapped up warm in hat, coat and boots on a soaking wet New York City street.
The mum-of-four rescheduled to coincide with Christmas on 1 December. For the Haunted Holiday Party she donned a jewel-encrusted face as Egyptian Queen Cleopatra, which benefitted Superstorm Sandy relief efforts.
Heidi's annual Halloween star-studded parties are attended by celebrities such as Black Eyed Peas singer Fergie, Mariah Carey, Pink, Anne Hathaway and Kim Kardashian.