On Instagram...
The Rock
Beyoncé, Jay Z, and Blue Ivy
Neil Patrick Harris and David Burtka
Lauren Conrad
Kelly Rowland
Kim Kardashian
Kylie Jenner
LeBron James
Allison Williams
Janelle Monae
Rita Ora
Ashanti
Josh Duhamel and Fergie
Miley Cyrus
Joe Jonas
Miranda Kerr
Kourtney Kardashian (and krew)
Shay Mitchell
Jessica Alba
Scott Eastwood
Tori Kelly
At Heidi Klum's Halloween party...
Casper Smart and Jennifer Lopez
Nicole Scherzinger
Heidi Klum and Gigi Hadid
Diane Guerrero
Dascha Polanco
Jackie Cruz
At the Casamigos Halloween party...
Channing Tatum and Jenna Dewan-Tatum
Gwen Stefani
The Game
Suki Waterhouse
Molly Sims
David Spade
Paris and Nicky Hilton
Michelle Trachtenberg
Joanna Krupa
Elsewhere in Hollywood...
Karrueche Tran
Lisa Rinna and Harry Hamlin
Janice Dickinson
LeAnn Rimes
Around the world...
Nicki Minaj
Simon Pegg
At the UNICEF Halloween Ball...
Hugh Grant
Poppy Delevingne
Michael Sheen
At The Annual Playboy Party...
Crystal and Hugh Hefner
Brody Jenner
Kendra Wilkinson
Clark Duke
Dan Maurio and screenwriter Diablo Cody
At the Maxim Halloween party...
Nick Jonas
Nicey Nash
Claudia Jordan
Val and Maksim Chmerkovskiy
Draya Michele
Need more inspiration from previous years? Check out these roundups from previous years: