Halloween Roundup - Our Favorite Celebrity Costumes

1 Beyonce

"Janet and MJ"

2 Jessica Alba

"#axlandslashforever #welcometothejungle @kellysawyer"

3 Molly Sims

"HAPPY HALLOWEEN EVERYONE #greatday #grateful"

4 Joe Jonas

"I’m pretty sure there’s a lot more to life than being really, really good looking. And I plan on finding out what that is. - Derek Zoolander"

5 Lea Michele

"HAPPY HALLOWEEN!!!!"

6 Ansel Elgort

"COW BOYYY Happy Halloween!!!"

7 Nicole Richie

"Happy Halloween from The Madden Family"

8 Rita Ora

"Happy Halloween! Livin that barbie life! Waaaat?"

9 Demi Lovato

"Happy Halloween from @wilmervalderrama and I"

10 Alessandra Ambrosio

"Happy Halloween #rawr #snowleopard #bigcat #happyhalloween"

11 Kim Kardashian

"Look #1- Skeleton"

12 Justin Bieber

Justin and his little bro went as matching power rangers!

13 Adriana Lima

"Happy Halloween from the Lima family:)"

14 Ashley Tisdale

"Lil Red ;) #happyhalloween"

15 Taylor Swift

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

16 Katy Perry

"IDFWU *drops mic*"

17 Pete Wentz

"May all of your Halloween dreams come true'

18 Ashley Benson

PLL star Ashley Benson was a porcelain doll!

19 Paris Hilton

"What a fun pregame party at my house last night I love my friends! #HottestHalloweenCrewEver"

20 January Jones

"Hashtag Christmas tree."

21 Hayden Panettiere

Hayden flaunted her baby bump in this year's Halloween costume!

22 Giuliana Rancic

"I finally got my trendy butt implants! So worth the pain. Thank u Dr Rancic:) #halloween2014 @billrancic"

23 Kelly Osbourne

"Drumroll please... On this hallows eve I am going as #MargotTenenbaum! What do you guys think? I hope I did you justice @gwynethPaltrow!!!"

24 Ryan Seacrest

"Heading into the lab! #madscientist"

25 Neil Patrick Harris

"Happy Halloween from Gotham City!!"

26 Iggy Azalea

"Happy Halloween!"

Who had your favorite costume? What was YOUR costume this year?