Scariest Celebrity Halloween Costumes

1 Demi Lovato as Pennywise

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2 Shay Mitchell as a Zombie Bride

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3 Michelle Trachtenberg as a Broken Porcelain Doll

Admit it: you'd be scarred for life if you saw this gal in real life.

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4 Demi Lovato as a Zombie of Some Sort

Image Source: Getty / Christopher Polk

Yeah, we're just going to be over here on the other side of the brick wall.

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5 Heidi Klum and Seal as Monkeys

Image Source: Getty / Jemal Countess

This is some Planet of the Apes madness, and we're not sure we're here for it.

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6 Kelly Obsbourne as a Clown

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7 Padma Lakshmi and Susan Sarandon as a Day of the Dead Bride and Groom

So much for "'till death do us part."

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8 Kim Kardashian as a Walking Skeleton

You'd totally run the opposite direction if you saw something like this coming your way.

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9 Heidi Klum as a Skinned Woman

Image Source: Getty / Chris Weeks

At least there's a doctor nearby, just in case.

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10 Scott Disick as Patrick Bateman (American Psycho)

Image Source: Getty

He might not look that scary, but if you had this guy chasing you through an apartment building, you can bet you'd be screaming your head off.

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11 Heidi Klum as a Butterfly

Image Source: Getty / Dimitrios Kambouris

Oh, you thought butterflies were cute and pretty? How about a butterfly the size of a human?!

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12 Ashley Madekwe as the Joker

Image Source: Getty / Stefanie Keenan

This instantly brings us back to Heath Ledger's brilliant, chilling performance in The Dark Knight.

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13 Miley Cyrus as a Nightmare Baby

Oh, it's totally fine, we didn't need any sleep this week. Or this month.

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14 Brittny Gastineau as a Vampire

We're just going to go ahead and padlock that coffin, OK?

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15 Adam Levine as Rambo

Image Source: Getty

You know, this one's kind of sexy-scary. We'll include just to give your eyes a rest.

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16 Josh Duhamel and Fergie as a Day of the Dead Pair

The pose makes them that much creepier.

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17 Ariana Grande as a Vampire

It's the eyes.

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18 Casper Smart and Jennifer Lopez as Skeletons

Image Source: Getty / Mike Coppola

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19 LeBron James as Pennywise

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