The American Idol host and his longtime girlfriend dressed up as Karl Lagerfeld and Anna Wintour at the Casamigos bash.
The "Two Ghosts" singer dressed up in a replica of Elton John's 1975 Dodgers concert outfit at the Casamigos Halloween party.
The rock star and Elle Evans enjoy date night at treats! Magazine's 8th annual Trick or treats! Halloween party at the private residence of Jonas Tahlin, CEO of Absolut Elyx.
The Hills star and his wife dressed up as characters from Scarface at the Casamigos party.
Brandon attended the Casamigos bash alongside his mom, Linda Thompson.
Diddy strikes a pose at the Casamigos bash.
Big Little Liars star attends the Casamigos Halloween bash.
Actress smiles for cameras at the Halloween celebration.
Paris strikes a pose in her costume at the Casamigos party.
Designer appears to be channeling her sister's 21st birthday outfit for her costume.
Actors share a laugh at the Casamigos Halloween party.
The reality star and her actor beau posed for photos at the Casamigos celebration.
Monsters and Vanderpump rules. The Bravo star gets spooked at Universal Studios Hollywood's "Halloween Horror Nights."
The Real Housewives of Beverly Hills star hosts Freixenet's annual Black Magic Halloween Party.
The couple got into the spooky spirit by hanging out at Universal Studios Hollywood's Halloween Horror Nights for a night of scary surprises.
The mom-of-two seemed to be having a good time at Universal Studios Hollywood's Halloween Horror Nights.
The engaged couple spent their night at Universal Studios Hollywood's Halloween Horror Nights and took a pic with some of the scary characters.
Most people would agree that frightening reunions with your ex is not something to look forward to, but these two consider it tradition. Every year, the former flames attend Universal Studios Hollywood's Halloween Horror Nights together.
The supermodel and her kids, Anja Louise and Noah Phoenix, were all smiles spending the day at the Mr. Bones Pumpkin Patch.
Proud mom Hilaria Baldwin shared this sweet photo of Alec and their daughter Carmen striking identical poses with pumpkins ahead of the holiday.
The former Project Runway host sported shades and a long flannel as she posed in front of a wall of pumpkins with her (hidden) kids.
The pop singer brought along Willow, 7, and Jameson, 1, to the pumpkin patch and captioned the Instagram post, "I think he's going to be a director and she's going to take it until one day she just beats the crap out of him."
It's family night for the reality stars who travel to Nights of the Jack in Calabasas, Calif. for a festive evening.
The Teen Wolf actor and Grey's Anatomy actress had a spooky third wheel on their Universal Studios' Halloween Horror Nights date.