Celebrity·Posted on Nov 1, 2014See What Your Favorite Celebrities Are Dressing Up As This HalloweenFrom Katy Perry as a flaming hot Cheeto, to Beyonce as Janet Jackson.by Kristin HarrisBuzzFeed StaffLinkFacebookPinterestTwitterMail 1. Katy Perry as a flaming hot Cheeto: 2. Colton Haynes as Fiona from Shrek: View this photo on Instagram 3. Lucy Hale as the Twitter bird: View this photo on Instagram 4. Naya Rivera as a mail order bride: View this photo on Instagram 5. Taylor Swift as a pegacorn: View this photo on Instagram 6. Chris Colfer as Grumpy Cat: View this photo on Instagram 7. Luke & Calum from 5SOS as Mario and Luigi: Luke Hemmings @Luke5SOS Mario and Luigi dominated the dance floor as per usual 08:00 AM - 31 Oct 2014 Reply Retweet Favorite 8. Ashley Benson as a doll: View this photo on Instagram 9. Bill and Giuliana Rancic as a plastic surgeon and patient: View this photo on Instagram 10. Liv Tyler as a bun in the oven: View this photo on Instagram 11. Lauren Conrad as a mermaid: View this photo on Instagram 12. Kate Hudson as Mother of Anarchy: View this photo on Instagram 13. Ashley Tisdale as a skeleton: View this photo on Instagram 14. Janel Parrish as a cat: View this photo on Instagram 15. Paris Hilton as Minnie Mouse: View this photo on Instagram 16. Kelly Osbourne as Magenta from The Rocky Horror Picture Show: View this photo on Instagram 17. Lily Allen as Dr. Luke.... 18. Matthew Morrison and his wife as Vincent Vega and Mia Wallace from Pulp Fiction: Matthew Morrison @Matt_Morrison Thanks to @FreixenetUSA for an amazing birthday/Halloween celebration. #FXHalloween 07:02 PM - 26 Oct 2014 Reply Retweet Favorite 19. Michelle Trachtenberg as Black Dahlia: View this photo on Instagram 20. Molly Sims as a 70s go go girl: View this photo on Instagram 21. Gavin Rossdale as a vampire: 22. Annalynne McCord as a "creepy chick": View this photo on Instagram 23. Ashley Madekwe as The Joker: View this photo on Instagram 24. Lance Bass as a spooky carnival dude (that looks straight off of American Horror Story: Freakshow): View this photo on Instagram 25. Cindy Crawford as Cher: View this photo on Instagram 26. Aaron Eckhart as an Army dude: 27. Justin Bieber as a Power Ranger View this photo on Instagram 28. Neil Patrick Harris & family as Batman characters: Neil Patrick Harris @ActuallyNPH Happy Halloween from Gotham City!! 09:34 PM - 31 Oct 2014 Reply Retweet Favorite 29. Beyonce and Blue Ivy as Janet and Michael Jackson: View this photo on Instagram 30. North West as a skunk: View this photo on Instagram 31. Demi Lovato and Wilmer Valderrama in Dia De Los Muertos costumes: View this photo on Instagram 32. Austin Mahone as a monk jedi: View this photo on Instagram 33. Adrian Grenier as a ring master: View this photo on Instagram 34. Camila Cabello as Princess Jasmine: View this photo on Instagram 35. Ed Sheeran as Austin Powers: View this photo on Instagram