When Hollywood celebrates Halloween, no expense is spared! From incredibly innovative costumes to the truly spooky, through the years A-listers, have done it all.
This year, Katy Perry made an unforgettable impression of Presidential candidate Hillary Clinton in an on point, red pantsuit complete with full prosthetic makeup.
Celebrity party-goers couldnโt help but double take as they saw what they almost believed to be the potential future President walk in the door, followed closely by a highly-caricatured, masked version of her opponent, Donald Trump, who happened to be Katyโs boyfriend Orlando Bloom!
Honorable mentions must also be awarded to Cindy Crawford and her family of model punks, and Kylie Jenner, who channeled Christina Aguileraโs Dirrty era in an uncanny wig and a pair of bare-all chaps.
Click though the gallery for some spooky Halloween inspiration!

Three generations, including mamma Tina Knowles, Beyonce and daughter Blue Ivy, stepped back in time with this retro Salt-N-Pepa recreation. WATCH the playful clip Queen Bey posted in the next slide for a sneak peak at Jay Zโs costume!
Beyonce, Jay Z and Blue Ivy do Salt-N-Pepa for Halloween

Today Extraโs David Campbell and his adorable family put on an Incredible display!

Coco Austinโs daughter Chanel was absolutely spoilt for choice! The new yummy mummy simply couldnโt choose between Snow White, a pumpkin, a daisy or a little lamb, so she had her mini-me don them all!

Kourtney Kardashian and her kids Mason, Penelope and Reign sported matching Power Ranger unitards. โHappy Halloween!! May the power be with you,โ she wrote besides this happy snap.

Ellen DeGeneres pulled out all the stops when she stepped on stage dressed as singer Sia. And since the Chandelier hitmaker is never seen without her dancer Maddie Ziegler, Ellen rustled up Heidi Klum to play the part! WATCH the pair perform in the next slide!
Ellen and Heidi Klum perform Siaโs Chandelier

โBeen shopping with Dr. Seuss?โ Kelly Rowland wrote alongside her uncanny appearance as Dionne from the hit film Clueless.

Khloe Kardashian was ice cold as the spitting image of Storm from X-Men.

Neil Patrick Harris and his sweet family never miss an opportunity to dress up, and this year was no exception! The dads, dressed as Charlie Chaplin and Groucho Marx, posed alongside their kids Harper and Gideon, who put on their best impressions of Marilyn Monroe and James Dean.

Cindy Crawford
Cindy Crawford, husband Rande Gerber and their kids Presley and Kaia went as a gang of punk rockers.

Kate Hudson
Kate Hudson, who donned her best western look, awarded the top costume spot to songstress Katy Perry. โ#imwithher Best of the night โจ๐โจโ she wrote on Instagram.

Katy Perry
โHaving a little pre-party before I take office #IMWITHME,โ shared Katy in preparation for her big costume reveal.

Katy Perry and Orlando Bloom
Although she technically went to the bash with โhusbandโ Bill Clinton, Katyโs real-life boyfriend, Orlando Bloom, followed closely in an obnoxious Trump mask!

Jessica Alba and Kelly Sawyer
Jessica Alba and her bestie Kelly Sawyer were Absolutely Fabulous in their film-inspired get-ups.

Jenna Dewan-Tatum
Jenna Dewan-Tatum is the prettiest unicorn we ever did see!

Kelsey Grammer impressed us all as his evil Simpsons character, Sideshow Bob.

Naomi Watts
Naomi Watts and her spooky children got their fright on as a gory bunch!

Kylie Jenner
Kylie Jenner got down and Dirrty in this vintage Christina Aguilera look. โCan I be XTINA forever?โ the star penned on Instagram, beside a clip of her dancing. Watch in the next slide!
Kylie Jenner is Xtina for Halloween

Paris Hilton
Paris Hilton opted for a sexy version of Disneyโs Alice In Wonderland.

Kourtney Kardashian
โTill death do us part,โ a kreepy Kourtney Kardashian wrote beside this snap of her and a pal dressed as a zombie bride and groom.

Scott Disick
Kourtneyโs ex-husband Scott Disick let out his inner-superhero as he hosted an American Psycho Halloween bash at a Vegas nightclub.

Alessandra Ambrosio
โSo much fun being #JessicaRabbit last night,โ the Victoriaโs Secret angel Alessandra Ambrosio shared.

Paris Jackson
Paris Jackson, daughter of the late King of Pop, and her boyfriend Michael Snoddy went under the sea in mermaid- and Barnacle Boy-inspired outfits.

Bette Middler
Bette Midler gave us a fright when she stepped out dressed as her Hocus Pocus character Winifred Sanderson.

Emily Ratajkowski
Model-slash-actress Emily Ratajkowski was the Queen of the Nile as she channelled Egyptian beauty Cleopatra.