Our Favorite Celebrity Halloween Costumes

Rapper Iggy Azalea (far right) showed she has quite the sense of humor. After Snoop Dogg said she looked like Marlon Wayans of White Chicks, she dressed up as the character for Halloween. Certainly she had Demi Lovato (far left), who went as Lucille Ball, laughing. She posted this picture to her Instagram saying, "Me, @jlo & @thenewclassic who had me dying tonight with that costume."

Debra Messing dressed up as Kit from the classic baseball movie A League of Their Own while her son, Roman, channeled Al Capone.

Neil Patrick Harris, David Burtka, and twins Harper and Gideon dressed up as classic Batman characters: the Riddler, the Joker, Catwoman, and the Dark Knight himself.

Sarah Hyland dressed up as Warhol muse Edie Sedgwick while Hailee Steinfeld took on Miranda Sings, an Internet character created by YouTube personality Colleen Ballinger.

Adriana Lima and her family went as characters from The Little Mermaid (the Disney movie turns 25 this month!).

Alessandra Ambrosio channeled her wild side as a snow leopard this Halloween.

"On this hallows eve I am going as #MargotTenenbaum! What do you guys think?" Kelly Osbourne captioned this photo. "I hope I did you justice @gwynethPaltrow!!!"

"My little stinker is waiting to show daddy her costume. Halloween has started early this morning," Mom, Kim Kardashian, wrote about North's adorable skunk costume.

"Its all about CAPTAIN CANADA. Killing the villains with Kindness," Nina Dobrev said about her take on the Marvel character Captain America.

It's a Barbie world for pop star Rita Ora, who attended the Death of a Geisha costume party in London.

Who knew Leonardo wore a corset? Riri went as a gilded version of the Teenage Mutant Ninja Turtle (her pals were dressed as the other characters) while out and about in New York City.

Blood-sucking never looked so good. The hot music couple wore coordinated vampire costumes to Kate Hudson's annual Halloween party in Brentwood, California.

The actress, who posted this photo to Instagram, made for a sexy little red riding hood.

Fashion flock! The reality star dons a bob as editor in chief of Vogue Anna Wintour, while little North dressed up as Andre Leon Talley, her makeup artist Joyce Bonellie as Grace Coddington and Bonelli's son as a mini Karl Lagerfeld.

Not content with just one costume, Kardashian is a fright with her second costume: a gorgeously spooky skeleton!

Pop royalty! Beyonce is in full Janet Jackson mode while Blue Ivy dresses as Michael Jackson.

Swift got creative with her costume, dressing up as a hybrid between a unicorn and Pegasus, or a "pegacorn" as the singer captioned her costume on Instagram.

Known for her spectacular costumes, Klum didn't disappoint this year with this maximalist butterfly getup, which she wore to her 15th annual Halloween party.

The mother-daughter duo and their gang of friends dressed up as the crew from Sons of Anarchy for Hudson's Halloween bash in Los Angeles.

For Kate Hudson's Halloween Party in Los Angeles, the singer was on fire in a Flamin' Hot Cheeto costume, complete with a red bodysuit, red hight-top converse, and a Hot Cheetos purse.

Hudson complemented her new pink locks with Day of the Dead face paint in a bright palette of pink, blue, and white. She finished the look with an oversized rose in her hair.

"Always a Dorsey," Rivera captioned this shot of her and husband Ryan Dorsey, who dressed up as a mail order bride and a mailman.

The hilarious Kardashian played dress up in a costume store a week before Halloween, posting this photo of herself wearing a large feathered fruit headdress and microphone. "Microphone check...1,2,1,2," Kardashian captioned the shot.

Osbourne celebrated her 30th birthday a few days early with a costume party. The singer shared this photo of herself dressed up as Magenta from The Rocky Horror Picture Show, with her hairdresser as her fictional brother, Riff Raff.

Delevingne was her usual jokester self a week before All Hallows' Eve, donning a black and blue pixie wig and yellow hat in a photo she shared on her Instagram account. "No planning, just matching," she captioned the pic.

Hale channeled one of everyone's favorite avian animals, the Twitter Bird, in head to toe blue (including blue lipstick!) and large white wings.

Crawford and her husband impersonated one of the most famous musical duos ever, Sonny and Cher, for a Halloween party hosted by Tequila Cassamingos in Beverly Hills, Calif.

At the same party, Sims highlighted her growing baby bump (she's currently expecting her second child) in head-to-toe neon pink accented with gold sequined fringe.

Madekwe channeled Heath Ledger as the Joker for Matthew Morrison's fifth annual Halloween party in Los Angeles.

Trachtenberg embraced the gory side of Halloween, dressing up as the Black Dahlia. "#Halloween festivities have begun. #BlackDahlia #ThisIsHalloween," she captioned a photo of her costume on Instagram.

Cyrus got in the Halloween spirit when she posted this photo of herself wearing a creepy baby mask to her Instagram account.

Simpson and her husband Eric Johnson started the 2014 festivities a few weeks early. While the singer's simple costume consisted of a glam eye mask, Johnson opted for something a bit more risqué-his wife's underwear. "When your husband doesn't have a mask... A Hanky Panky lace option will be the hit of the party!!!" Simpson captioned the photo on Instagram.

In 2013, Conrad and now-husband William Tell picked an adorable couples costume choice for Matthew Morrison's Halloween Party in Hollywood: a tooth fairy and dentist! The lifestyle maven actually made her costume herself with just some tulle and a ribbon.

Upton channeled Marie Antoinette for the night, but with a twist—the model and actress painted her face with Day of the Dead-style facepaint.

“Oops I did it again..... #zombies #infected,” Tisdale captioned this photo of her and now-husband Christopher French on Instagram. The High School Musical actress was a zombie schoolgirl while her beau was a zombie priest.

Sims invoked 1940s movie star Carmen Miranda for a party at a private residence in Beverly Hills. The model donned a slinky pink gown, oversized earrings, and an undo finished off with-what else?-a fruit arrangement.

That hair! Azalea hit a London Halloween party costumed as Disney villain Cruella de Vil and walked the red carpet with a perfectly posed Dalmatian. Her add-on accessories? Tons of silver jewelry, red pointy-toe pumps, and silky white gloves.

Funny girl Melissa McCarthy and gal pal Sandra Bullock partnered up incognito-style as bearded fishermen this year while taking Bullock's son Louie trick-or-treating.

There couldn't be a cuter Cowardly Lion and Dorothy from The Wizard of Oz than Tom Brady and Gisele Bündchen! The model shared this sweet photo on her Instagram with the caption, "Having fun with my Lion last night!"

It wouldn't feel like Halloween if Kelly Ripa and Michael Strahan didn't get in costume! This year, the dynamic duo dressed up as Miley Cyrus and Robin Thicke from their jaw-dropping VMA performance.

Kerr and her 2-year-old son Flynn celebrated Halloween together as a kitten and Superman. Kerr shared the photo on her personal Instagram and wished her followers a "Happy Halloween!"

Across the pond in London, Moss attended a Halloween party alongside her husband Jamie Hince dressed in an extravagant red and black gown, Day of the Dead face paint, and a black wig and headdress.

Midler donned a parasol and pageant sash to complement her black lace gown while attending the annual "Hulaween in the Big Easy" party in New York City on Halloween night.

The Queen B took to Instagram to show off her angel costume, which she accessorized with a halo and wings.

Tyler went for an all black gothic look when she hit New York City streets on Halloween. Her gory makeup and unkempt hair added oomph to her spooky style.

The couple coordinated their Halloween costumes again in 2013 and this time they dressed up in Day of the Dead-inspired costumes. Duhamel posted the photo on his Instagram with the caption reading, "Hasta la muerte."

Lovato set the scene for her Halloween Party in West Hollywood when she showed up in horror movie-like makeup, chilling contact lenses, and an eerily bloodstained dress.

Sandra Bullock and son Louie showed spook-tacular team spirit in 2013 as they proved that there is more than one way to dress up as a skeleton.

Klum's costume is always the most anticipated and the supermodel didn't disappoint in 2013. Ultra-realistic age spots and drastic wrinkles launched the usually taut and stunning star decades into the future for her annual Halloween bash in N.Y.C. To complete her old lady ensemble, Klum wore a pearl necklace, printed separates, and carried a cane.

The Fashion Police host dressed as comedian Barry Humphries's "Dame Edna" character by teasing her purple-gray hair in a Dame-like ’do. To complete her spoof-style costume, Osbourne added a feathered boa and bold cat-eye glasses.

Staying true to her lady-like roots, Martha Stewart went all out glam in a pale pink tulle gown as Glinda the Good Witch from The Wizard of Oz at the Hub Network Halloween bash in Santa Monica, Calif.

For the second year in a row Neil Patrick Harris and David Burkta kicked dressing up solo to the curb. Instead, the two employed their adorable twins as Alice in Wonderland cast members to accompany their Tweedledee and Tweedledum costumes.

The supermodel was barely recognizable when she hit the streets costumed as Guns N' Roses lead guitarist Slash.

Proving that she can pull anything off (including a blazing red bob!), Ambrosio stunned as the Queen of Hearts at the Casamigos Halloween Party in Beverly Hills.

There is no way that this undercover agent was going unnoticed! Rivera hit the scene costumed up as Carmen Sandiego in a red body suit and trench with patent leather thigh-high boots.

Zoe switched up her glamorous style for Halloween festivities and opted for this Cher ensemble (husband Rodger was Sonny)—leave it to Zoe to have all the right accessories to nail the look!

Duff chose to keep her costume sweet and simple with add-on ears and whiskers.

As tiny as she may be, Chenoweth's costume proves she is not one to mess with. The star showed off her tough-girl ensemble clad in a SWAT team vest, slick black pants, and a baseball hat.

The new parents kept their costumes spooky this year, Fergie dressed as Elvira and Duhamel suited up as Riff Raff from The Rocky Horror Picture Show.

Lowndes showed off her creative skills and pulled out all the stops this year when she dressed up as Batman's Poison Ivy. Her extravagant makeup and intricate hair 'do add oomph to her costume and take her look one step further.

Martha Stewart and Blake Lively got into the spirit of the season when Lively was a guest star on The Martha Stewart Show in 2008. Stewart went all out as Medusa, while Lively channeled Cleopatra.

Sandra Bullock and her son Louis coordinated their costumes in 2012 by dressing up as Woody and Buzz Lightyear from Pixar's Toy Story.

Neil Patrick Harris, David Burtka and their twins Gideon and Harper made Halloween a family affair in 2012 by dressing up as characters from The Wizard of Oz.

Ellen Degeneres pulled out all the stops last Halloween when she dressed up as Modern Family star Sofia Vergara by re-creating the dress she wore to the 2012 Emmys!

Stacy Keibler looked boo-tiful as the host of a Halloween masquerade at the Hyde Bellagio in Las Vegas in 2012. Keibler paired her costume with jewelry by Graziela and Dana Rebecca Designs.

For Halloween 2012, Supermodel Giselle Bundchen channeled the Egyptian pharaoh, Cleopatra, with a gold headpiece, bright blue eyeshadow, and beaded black locks.

In 2012 Jessica Alba, husband Cash Warren, and daughter Honor dressed as the cast of Pixar's The Incredibles for Gwen Stefani's party in Hollywood.

Kim stuck with the green theme at Midori's 2012 Halloween party at Avenue in the Meatpacking District of Manhattan. The reality star opted for a curve-hugging mermaid costume topped off by a wig that cost more than $2,000.

Diddy made it rain purple for Halloween 2012 and dressed to the nines as the unmatchable Prince.

The 90210 actress wore a custom Chris March-designed look for Halloween in 2012 that was inspired by Mattel's Frankie Stein doll—sparkly purple jacket and all!