Neil Patrick Harris
Could Mr. NPH ever disappoint with his family photos? "Happy Halloween from Gotham City!!" he shared online.
Kaley Cuoco-Sweeting
Bet you didn't expect this! The Big Bang Theory star goes as Justin Bieber while her husband goes as Selena Gomez!
Nick & Vanessa Lachey
"Happy Halloween!! Peter, Hook, and the Croc had a great time trick or treating tonight...." the happy couple wrote.
Pink
Anybody else bugging out? "Happy Halloween from The Harts," the proud mom shared.
Britney Spears
Before performing in Las Vegas, the "Circus" singer makes time to celebrate with her two boys.
Miranda Lambert
It's all about girl power for Mrs. Blake Shelton this Halloween.
Behati Prinsloo
"Tommy Lee and Heather Locklear ready for the 80s again," Mrs. Adam Levine wrote on Instagram.
Hilary Duff
"#happyhalloween #trickortreat smell our feet," the All About Me" singer shared. "#captinamerica #wickedwitch candddddy hopefully this sugar crash makes him sleep in!!!"
Kendall Jenner & Cara Delevingne
Did we just find the most stylish Mario Brothers around?
North West & Penelope Disick
Khloé Kardashian catches her cute family members trick or treating in the neighborhood.
Iggy Azalea
The "Fancy" singer challenges Marlon Wayans' character from White Chicks while posing with Jennifer Lopez and Demi Lovato.
Holly Robinson Peete
Sorry Lacheys, but this Jack Sparrow costume may be the ultimate pirate costume.
Terry Dubrow
The Botched star gets in the Halloween spirit at a school event with his kids.
Beyoncè
Have you seen a better Janet Jackson and Michael Jackson impression? Bravo Queen Bey and Blue Ivy.
Gisele Búndchen
"That's what happens when you let your 4-year-old choose the family halloween costumes," Mrs. Tom Brady wrote on Halloween. "Happy Halloween!!! #dragonfamily #happyhalloween"
Justin Bieber
The "Baby" singer spends Halloween in Canada as a Power Ranger.
Lea Michele
Oh my Gleeness! Somebody is a super cute Little Red Riding Hood.
Kim Kardashian
The E! star wrote, "Look #1- Skeleton." Can't wait to see the other looks!
Kim Kardashian
Paging Vogue magazine! "Karl, Grace, Anna, Andre," the Keeping Up With the Kardashians star wrote with North West.
Giuliana Rancic
"My lil' Fireman," the E! News co-host shared on Instagram with her baby boy, Duke.
Mariska Hargitay
No, this is not a scene from Law & Order: SVU. The actress is just ready for October.
Amber Rose
The newly single supermodel gets in the Halloween spirit. "#ZombiePegBundy my night is just getting started," she wrote.
Demi Lovato
After ending her tour, the "Really Don't Care" singer enjoys a "end-of-tour costume party."
Lily Aldridge
Cue the awwws! "My pumpkin," the supermodel shared online.