Tori Spelling & Dean McDermott
One week after Halloween weekend, the Hollywood couple enjoys one final thrill at Halloween Horror Nights at Universal Studios Hollywood.
Alessandra Ambrosio
The supermodel looks devilish at her Heaven and Hell Party presented by VO|CO and held at 1OAK in Los Angeles.
Renee Puente, Darren Criss, Mia Swier & Matthew Morrison
The Finding Neverland star hosts his party presented by Freixenet Spanish Cava with Podwall Entertainment at Marquee NYC.
Zachary Levi
The Heroes Reborn star joins co-stars Eve Harlow, Robbie Kay, Gatlin Green, Jake Manly, Clé Bennett and Toru Uchikado for a night out at Universal Studios Hollywood.
Miranda Lambert
The country star appears with friends dressed as the Rockford Peaches from A League of Their Own. "There's no crying in baseball" #peaches #charisma," she wrote on Instagram.
Kat Graham
The Vampire Diaries star dons a Monsters, Inc. costume.
Joe Jonas & Derek Hough
The singer and the Dancing With the Stars pro hang out on Halloween night.
Kendall Jenner
The reality star dresses up like Karl Lagerfeld in Shady Zeineldine clothing while arriving at Bootsy Bellows.
Jennifer Lopez
Live it up, J.Lo. The American Idol judge doesn't disappoint at Heidi Klum's annual party while wearing a costume designed by Michael Costello.
Jonny Drubel
The #RichKids of Beverly Hills star shows off his muscles as Batman at Fred & Jason's Halloweenie bash in L.A.
Adam Lambert
The American Idol alum arrives at his Ghost Town Halloween Party hosted by Hilton@PLAY.
Katy Perry
The singer appears as a dropped mic.
Gwyneth Paltrow & Apple Martin
The actress and her 11-year-old mini-me daughter are twins once again on Halloween.
Shawn Booth & Kaitlyn Bristowe
"When you're Curious George for Halloween, you ask your spray tan lady to give you the Nutella glow #HappyHalloween #Boothstowes," The Bachelorette stars wrote on Instagram.
Mariah Carey & James Packer
The singer and her boyfriend are adorable while hosting a holiday party at a Beverly Hills estate.
Ruby Rose & Nick Jonas
The OITNB star and the hunky singer party at XS Nightclub in Encore at Wynn Las Vegas.
Emily Ratajkowski
The actress and "Blurred Lines" model is Marge Simpson at Heidi Klum's party.
Nina Agdal
The model rocks a blue and leather look at Heidi Klum's New York City party.
Heidi Klum
Well hello, there! The Project Runway host channels a sexy Jessica Rabbit at Lavo in New York City.
Catherine Lowe & Sean Lowe
The Bachelor couple do a little switcheroo!
Kourtney Kardashian
The Keeping Up With the Kardashians star and her three kids are true superheros on Halloween night!
Fergie, Josh Duhamel & Axl
"Trick or Treat?!" the actor wrote on Instagram.
Jennifer Aniston & Justin Theroux
The two wear masks as they leave the Chateau Marmont Hotel on Halloween Eve.
Ashanti
The singer is a Smurf at Heidi Klum's party.