Halloween 2016: The best celebrity costumes

Prime Minister Justin Trudeau took a break from work on Parliament Hill to join his wife Sophie and their three children - Xavier, 9, Ella-Grace, 7 and two-year-old Hadrien - for a night of trick-or-treating around their neighbourhood. <br>Photo: Twitter/@justintrudeau
Heidi Klum went all out as she hosted her annual Halloween party in New York. <p>The supermodel hit the red carpet flanked by five clones - all in prosthetics to make them look exactly like the star!</p> Photo: © Rex
Jessica Biel and son Silas jumped at the chance to help promote Justin Timerblake's new film <i>Trolls</i>. How cute is little Silas matching his dad? <br>Photo: © Instagram/@jessicabiel
Taylor Swift and her squad took on a variety of personalities. "Happy Halloween from Deadpool, a Cub Scout, Martha Brady, a space cadet, a granny with a lost cat, black swan, and a birthday girl dressed as a cat," wrote the singer on Instagram. <br>Photo: © Instagram/@taylorswift
Beyoncé, daughter Blue Ivy and mom Tina were the perfect Salt-N-Pepa. <br>Photo: © Instagram/@beyonce
The Carter family strikes again! Beyonce, Jay Z and Blue Ivy entered the world of Barbie. <br>Photo: © Instagram/@beyonce
Kate Upton and her fiancé Justin Verlander made the perfect Danny and Sandy from <i>Grease</i>. <br>Photo: Instagram/@justinverlander
Jonathan and Drew Scott felt the force as characters from <i>Star Wars</i> while Marilyn Denis embraced her extraterrestrial side. <br>Photo: © Instagram/@mrdrewscott
Martha Stewart wasn't your average nurse. <br>Photo: © Instagram/@marthastewart
Singer Leona Lewis was "all gold everything." <br>Photo: © Instagram/@leonalewis
Khloe Kardashian looked unrecognizable as Storm from <i>X-Men</i>. <br>Photo: © Instagram/@khloekardashian
Sia aka Ellen DeGeneres. <br>Photo: © Instagram/@ellendegeneres
New mom Behati Prinsloo was on the prowl. <br>Photo: © Instagram/@behatiprinsloo
"Halloween! Creatures are out tonight" Emily Ratajkowski channelled Cleopatra. <br>Photo: © Instagram/@emrata
I'm with her! Katy Perry showed her election colours by trying Hillary Clinton's iconic red suit (and face!) on for size. She attended Kate Hudson's Halloween shindig with a Bill Clinton played by her agent Michael Kives. <br>Photo: © Instagram/@katyperry
The singer was joined at Kate Hudson's party by her boyfriend Orlando Bloom, who was transformed into Donald Trump. <br>Photo: © Instagram/@katyperry
Cindy Crawford and her family dressed as punks. <br>Photo: © Instagram/@cindycrawford
"thanks for joining our dinner tonight " said a ghoulish Kylie Jenner, posing with boyfriend Tyga. <br>Photo: © Instagram/@kyliejenner
The reality TV star's resemblance to Christina Aguilera was uncanny for her second costume. <br>Photo: © PA
Kelly Rowland dressed up as Dionne from <i>Clueless</i>. <br>Photo: © Instagram/@kellyrowland
"Rollin' up to my school #Halloween dance as the flyest guy I know!" Jacob Tremblay, a.k.a. <em>Back To The Future</em>'s Marty McFly, captioned this photo with his superhero friend. <br>Photo: © Instagram/@jacobtremblay
<em>Pretty Little Liars</em> star Shay Mitchell and her friends dressed up as bikers. <br>Photo: © Instagram/@shaym
Jenna Dewan Tatum wowed as a unicorn. <br>Photo: © Instagram/@jennaldewan
Demi Lovato and Nick Jonas dressed up as Dorothy and the scarecrow from The Wizard of Oz. <br>Photo: © Instagram/@nickjonas
Marc Jacobs shocked as a female bodybuilder. <br>Photo: © Instagram/@themarcjacobs
Alessandra Ambrosio as Jessica Rabbit. <br>Photo: © Instagram/@alessandraambrosio
Ellie Goulding dressed as a captain. <br>Photo: © Instagram/@elliegoulding
Kate Hudson looked to the west for inspiration as she hosted a star-studded crowd at her Halloween party with a gaggle of saloon gals. <br>Photo: © Instagram/@katehudson
Bette Midler pulled out all the stops yet again for her charity masquerade, where the 70-year-old actress reprised her beloved <em>Hocus Pocus<em> character, Winnie Sanderson. <br>Photo: © PA
<em>The Goods</em> host Jessi Cruickshank did a spot-on Sally Jesse Raphael! <br>Photo: © Instagram/@jessicruickshank
"Happy Halloween from Siegfried & Roy " said Nicole Richie. <br>Photo: © Instagram/@nicolerichie
Scream queen Emma Roberts. <br>Photo: © Instagram/@emmaroberts
Kathy Griffin snapped her way through Bette Midler's annual Hulaween bash! <br>Photo: © PA
Jessica Alba and her bestie had a wild night as <em>Absolutely Fabulous</em> characters Patsy and Edina. <br>Photo: © Instagram/@jessicaalba
"Pow! Boom! Crash!" said Tracy Moore of her Little Miss Chatterbox costume. <br>Photo: © Instagram/@thetracymoore
Leopard and liquid liner! Rachel Zoe was the ultimate Edie Sedgwick, complete with her own Andy Warhol. <br>Photo: © Instagram/@rachelzoe
Nina Dobrev and a pal played out the iconic scene in <em>The Revenant</em> when Leonardo DiCaprio's character found refuge inside a horse - complete with the actor's first oscar! <br>Photo: © Instagram/@ninadobrev
"Just our typical Monday night," Kourtney captioned this photo of herself and her friends. <br>Photo: © Instagram/@kourtneykardash
Friend Joyce Bonelli joined the celebrations. <br>Photo: © Instagram/@kourtneykardash
Jemima Khan stole the show at the UNICEF Halloween Ball as Melania Trump, with her scene-stealing husband Donald Trump close at hand... <br>Photo: © Instagram/@khanjemima
Charli XCX unleashed her inner devil for the KISS Haunted House Party. <br>Photo: © Instagram/@charlie_xcx
Shakira cast a spell as a magician. <br>Photo: © Instagram/@shakira
Ireland Baldwin attended a party as a naughty nun. <br>Photo: © Instagram/@humancrouton
Mariah Carey dressed as a devil for her pre-Halloween celebrations. <br>Photo: © Instagram/@mariahcarey
Seth Rogen and his wife Lauren Miller made the perfect Mario and Luigi team at the actor's 5th Annual Hilarity for Charity Variety Show in support of the Alzheimer's Association. <br>Photo: © PA
Lauren Conrad <br>Photo: © Instagram/@laurenconrad_com
Princess Beatrice worked a feline-inspired costume on the blue carpet at UNICEF's Halloween Ball in London. <br>Photo: © PA
Kourtney Kardashian <br>Photo: © Snapchat
Scott Eastwood paid tribute to his dad Clint by dressing up as his character from <i>The Good, The Bad and The Ugly</i>. <br>Photo: © PA
America Ferrera dressed up as Cloud 9 for the Halloween episode of her comedy <i>Superstore</i>. <br>Photo: Instagram/@americaferrera
Fashion designer, and Duchess of Cambridge favourite, Alice Temperley channelled Maleficent at the UNICEF bash. <br>Photo: © PA
Shane West <br>Photo: © PA
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