Over the years, Hollywood has pulled out all the stops [1] when it comes to Halloween [2], giving us hundreds of spectacular looks to appreciate and imitate. Plenty of stars have gone the sexy route [3] — we're looking at you, Kim Kardashian [4] — while others opt for dialing down the sex appeal [5]. And of course, we can always expect the industry's hottest couples to pair up and shut it down [6]. But perhaps the most fun costumes have been those that dial up the horror, just enough to give you the creeps. We're talking zombies, skeletons, and yes, plenty of creepy clowns. Keep scrolling for some of the scariest celeb Halloween costumes.

Heidi Klum as a Skinned Woman

Demi Lovato as a Zombie of Some Sort

Heidi Klum and Seal as Monkeys

Scott Disick as Patrick Bateman (American Psycho)

Ashley Madekwe as the Joker

Heidi Klum as a Butterfly

Adam Levine as Rambo

Casper Smart and Jennifer Lopez as Skeletons