For the past eight years, the highlight of the couple's social calendar was Halloween, when they stepped out in increasingly elaborate costumes year after year.
Now the couple have split, Heidi faces celebrating the spooky celebration without her partner in crime, but the prospect of going it alone hasn't dampened her enthusiasm.
The German model posted on Twitter: "Four weeks until my favourite holiday! Can't wait to show you guys the crazy costume I have in store for this year."
Accompanying the tweet, Heidi posted a montage of some of her favourite outfits of recent years, including a cat costume, a raven and the gruesome body suit she wore last year.
Seal didn't appear in any of the pictures she chose.
Since her split from her musician husband, Heidi has started dating her body guard Martin Kristen. But it remains to be seen if he will accompany her to any Halloween parties.
It seems the romance is in the early stages as Heidi recently admitted she was seeing him but said: "I don't know where it's going".
The pair did have a musical date this week however, stepping out to see Justin Bieber in concert.
The gig obviously went down well with Heidi, who tweeted: "@justinbieber you were great."