Heidi Klum Halloween
Heidi Klum attends Moto X presents Heidi Klum's 15th Annual Halloween Party, sponsored by SVEDKA Vodka, at TAO Downtown in New York City.Getty

Halloween is upon us and celebrities have appeared in their best costumes for the occasion.

Heidi Klum, who is evidently Halloween's biggest fan, dressed as a butterfly for her annual bash in New York City.

Beyonce dressed as Janet Jackson from her Rhythm Nation music video and her daughter, Blue Ivy, went for Michael Jackson's outfit at the 1984 American Music Awards.

Kim Kardashian donned a skeleton costume and her daughter North West was seen in a skunk outfit.

Katy Perry dressed as a giant Cheeto and Taylor Swift was a unicorn-pegasus hybrid Pegacorn.

Scroll down to take a look at celebrity Halloween costumes below:

Janet and MJ

A photo posted by Beyoncé (@beyonce) on

Look #1- Skeleton

A photo posted by Kim Kardashian West (@kimkardashian) on

My little stinker is waiting to show daddy her costume. Halloween has started early this morning

A photo posted by Kim Kardashian West (@kimkardashian) on

Cause, darling I'm a nightmare dressed like a PEGACORN. #HappyHalloween!

Taylor Swift(@taylorswift)張貼的相片 於

??

Фото опубликовано Ashley Benson (@itsashbenzo) в

IDFWU *drops mic*

A photo posted by KATY PERRY (@katyperry) on

This year I go as the Twitter bird.

A photo posted by Lucy Hale (@lucyhale) on

#axlandslashforever #welcometothejungle @kellysawyer

A photo posted by Jessica Alba (@jessicaalba) on

The Hudson's unite ❤️! Thank u @hudsonjeans_pk @hudsonjeans for making these killer costumes a reality ?

A photo posted by Kate Hudson (@katehudson) on

Happy Halloween - love Michelle and me

A photo posted by Rosie ODonnell (@rosie) on