Kim Kardashian (Photo: Harpersbazaar)

Kim Kardashian

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The reality TV star had a different thing going on this year. The billionaire went the superhero route, transforming into the X-Men character Mystique.

Taking a spin from her everyday style, the SKIMS founder transformed into a mutant.

The star wore a blue rubber unitard-style catsuit which she paired with matching makeup, yellow contact lenses and a red slicked-back wig.

 Janelle Monae (Photo: Harpersbazaar)

Janelle Monae

The singer and actor pulled off a stunning full-body transformation into Diva Plavalaguna, the alien singer from The Fifth Element.

 Kourtney Kardashian and Travis Baker (Photo: Harpersbazaar)

Kourtney Kardashian and Travis Baker

The two dressed up as Chucky and the Bride of Chucky and celebrated their first Halloween as a married couple.

 P Diddy (Photo: Harpersbazaar)

Diddy

The mogul expertly channelled Heath Ledger's "Dark Knight" villain in a purple suit, green vest and wig and terrifying makeup