Kicking off the weekend in a muscle-painted body suit, Heidi partied as a human body - even arriving on a stretcher for added effect. But it was for her and hubby Seal's 12th annual Halloween bash that she really pulled out all the stops. Making a terrifying entrance in matching ape costumes, the costume-loving couple were unrecognisable in their primate forms.
And while her fellow celebs opted for all kinds of spook-tastic outfits, Nicole Richie went a little off-piste in her take on J-Lo, working a pink tracksuit and slicked back hair - we hope Jen saw the funny side of it!
Joining Nic in the more alternative costume ideas was Brit Alexa Chung who partied dressed as a cute lamb.