15 Best Celebrity Halloween Costumes 2014: Heidi Klum, Katy Perry, Beyonce and Justin Bieber Go All Out!

And just like that Halloween is over! Boo! We just CANNOT get over all the craziness that went down that night. The stars really outdid themselves this time. Well, if you have the money to be (or at least dress) whoever you want to be even for just one night , wouldn't you go all out? We've round up some of the best celebrity Halloween costumes we've seen this year. We loved Katy Perry who took quite a literal take on the meaning of Trick or Treat... but trust us, you've got to see Heidi Klum!

Check out our list below:

Doesn't Ed Sheeran look adorable as Austin Powers? Yeah baby!

Check out cute couple Chris Brown and Karrueche Tran channel their inner "Grease"

As if! Miley Cyrus went as her "role model" Godmother Dolly Parton and her sister Brandi totally channeled Cher from "Clueless."

Joe Joans looks as hot as ever as Derek Zoolander.

Awww! "HIMYM"'s Neil Patrick Harris, partner David Burtka and their children Gideon and Harperchanneled some Gotham vibes.

Rihanna came as a Teenage Mutant Ninja Tutle...just because.

Britney Spears brought "Hit Me Baby One More Time" vibes with a toned down version of this sexy school girl outfit.

Kim Kardashian wore not one but TWO outfits... first she was a skeleton.

Then... she was Anna Wintour.

Taylor Swift brought her adorkiness in her Pegacorn outfit! (You know, Pegasus and Unicorn?)

Beyonce and Blue Ivy as Janet and Michael Jackson. So adorbs!

Katy Perry was one, big, hot... Cheeto.

Justin Bieber was a red power ranger.

Iggy Azalea dress up as "the girls from White Chicks" and she nailed it!

Gamer girls? Models Kendall Jenner and Cara Delevigne went as Mario and Luigi

As the reigning Halloween queen, Heidi Klum was a rainbow colored...err, butterfly. It was extremely detailed we can't look away!