TMZ'S HALLOWEEN 2021 Pop Culture, Music and More ... The Many Looks of Britney

After a Halloween away from the office, TMZ is back together in person for another spooktacular day ... sharing costumes and some scary good times!!!

It's definitely been the year of Britney, and lots of costumes in the office reflected the singer's many eras ... from "Toxic" to "Slave 4 U." There was also some politics, billionaires and even Kim K at The Met Gala mixed in.

Jake Paul, Jeff Bezos, AOC, Run-D.M.C., Dog the Bounty Hunter, Kanye West, Morgan Wallen, Olivia Rodrigo and Bernie Sanders were all fair game ... and it wouldn't be Halloween 2021 without a 'Squid Game' costume.

Halloween falls on a weekend this year, so be sure to check the website for plenty more celeb looks, haunted parties and holiday treats.

Happy Halloween folks ... stay warm out there!!!

'The Nun' 'Memba Her?!

Eerie actor Bonnie Aarons had the world saying their prayers after she took on the role as the demon, Valak -- who takes the form of a terrifying nun and exercises evil to attack paranormal pros -- in the 2016 freaky film, "The Conjuring 2" ... and the 2018 holy spinoff film "The Nun."

Bonnie shared the scary big screen with Patrick Wilson and Vera Farmiga as the on-screen version of the paranormal couple Ed and Lorraine Warren.

She can also be spotted in "The Princess Diaries" and "The Princess Diaries 2: Royal Engagement" as Baroness Joy Von Troken.

Guess what she looks like now without the spooky makeup and horrific habit.

Celebrity Pets All Dressed Up For Halloween!!!

Hollywood's best costumes don't stop at the hottest L.A. clubs ... celebrity pets have always gotten into the spooky season with some treat-worthy looks too!

Queen Latifah's cute canine is taking to the seas in his sailor costume, Resa Farahan's festive feline pays homage to Queen and cat-lover Cleopatra, Burt Jenner's pooch is feeling French, and Justin Bieber's pup is ready to save the day as Superman.

Kaley Cuoco, Derek Hough, Chelsea Handler, and Eva Longoria are just a few other parents decking out their animals with adorable accessories!

Take a walk through this gallery of fetching celebrity pets in Halloween costumes to get you in the spirit!

Who wants a treat?!

Celeb Costumes Who'd You Rather?!

Hollywood has never had a shortage of celebs in wild Halloween costumes ... but with thousands of looks hitting the holiday each year there is bound to be some copy/paste costumes.

Vanessa Morgan and Lele Pons have both melted eyeballs with their Maleficent attire, Cardi B and Tessa Thompson turned the world to stone as Medusa, the cast of 'Riverdale' and Tana Mongeau's friends took on 'The Powerpuff Girls' ... and we need you to settle the age-old question.

Scroll through this gallery of celebrities in costumes and vote for who you are serving up treats ... and who is left with tricks.

Boo'd you rather?!

Guess Who This Witchy Girl Turned Into!

Before this pint-sized sorceress was enchanting audiences with her powerful performances in film, she was just another costumed kid trying to give you a scare in Brooklyn, New York.

This spooky sweetie is usually not the villain of her storylines ... she's best known for playing many royal characters, one princess part even launched her career. She dreamed a dream and it led to her beautiful singing voice winning her numerous awards, including an Academy Award for Best Supporting Actress.

Now, she's gone back to her runt roots and just recently starred in an HBO movie casting devious spells.

Can you guess who she is?

Small Dong March End Small Penis Shame!!!

There's a movement to end the shame cast down upon those with small penises ... and it's getting bigger.

Los Angeles played host to the "Small Dong March" ... with throngs of folks taking to the streets to try and end the stigma around tiny members.

As you can see, people busted out a bunch of funny signs to make their point ... so click through the gallery to see some of the more creative cracks.

The Small Dong March is the brainchild of YouTube stars Chad and JT ... the surfer bros famous for pitching the San Clemente City Council on a 12-foot-tall Paul Walker statue.

Not everyone in the march was there because they had a small dong ... despite some of the chants you can hear on video echoing down the streets.

We're told attendees did not have to pack a small penis themselves, they could just be an ally.

102721-small-dong-shame-protest-kal
NO LAUGHING MATTER
@beach_pub_siesta / Instagram

The Small Dong March is the latest step in the crusade to end small penis shaming ... the organizers previously hosted a small dong art show.

No word what's next, and it might take a big effort to change hearts and minds ... but ya gotta start small.

Halloween 2021 Celebs In The Spooky Spirit

It's not quite Halloween yet, but that hasn't stopped Hollywood from getting into the spirit early ... showing off elaborate costumes, some solo, some in groups, and some paying tribute to their early acting days.

Celebs from 'Housewives' stars Kyle Richards and Kathy Hilton -- who went as circus ringmasters and medical pros -- to Jason Biggs and his wife, who took the more traditional vampire route have already posted pics of their costumes.

However, it's Drew Barrymore who paid homage to her "Scream" roots, dressing up as her character, Casey Becker, from the horror classic ... complete with Ghostface.

Among some of the other notable getups -- Olympian Ryan Lochte and his crew went as the Addams Family, Charli D'Amelio as Charlie Brown and Travis Barker with Kourtney Kardashian as Sid and Nancy.

The holiday is quickly approaching, so expect a lot more looks, both elaborate and not, to pop up on social media and at A-list parties across the country ... cuz if there's one thing celebs love, it's playing pretend.

Anakin Skywalker in 'Star Wars' 'Memba Him?!

Canadian actor Hayden Christensen was in his early 20s when he took on the role of the lightsaber-swinging Jedi, Anakin Skywalker -- who trains under the apprenticeship of Obi-Wan Kenobi and fathers twins with Padme Amidala before going to the dark side and becoming Darth Vader  -- in the 2002 sci-fi film "Star Wars: Episode II - Attack of the Clones" and the 2005 follow-up "Star Wars: Episode III - Revenge of the Sith."

The movie masterpieces were packed with big stars including Ewan McGregor as the young version of the level-headed Jedi, Obi-Wan Kenobi, Samuel L. Jackson as the Jedi Councilman with a purple lightsaber, Mace Windu ... and of course Natalie Portman as the Naboo queen and baby mama, Padme Amidala.

Hayden has been making headlines with the announcement of his return to the franchise in 2022.

Guess what he looks like now at 40 years old!

Guess Who This Pumpkin Pip-Squeak Turned Into!

Before this gourd-eous girl was stirring up spells in a popular television show, she was just another pumpkin pip-squeak getting ready for Halloween in Geneva, Switzerland.

This festive female is best known for her supporting role as on-screen best friend to the lead -- played by actress Nina Dobrev -- in a dark, supernatural series that was based off a best-selling book filled with vampires, werewolves, witches and ghosts!

Now, you can hear her reimagining the classic character of April O'Neil on "Rise of the Teenage Mutant Ninja Turtles," an animated Nickelodeon television series and movie!

Can you guess who she is?

'I Know What You Did Last Summer' Cast 'Memba Them?!

After a dreadful 4th of July night back in 1996, a group of friends -- Sarah Michelle Gellar, Freddie Prinze Jr., Jennifer Love Hewitt, and Ryan Phillippe -- reconnect when they are faced with the killer consequences of their actions.

"I Know What You Did Last Summer" came out 24 years ago ... but the young cast in the slasher film haven't aged a bit. We don't know what you did last summer, but we sure know what you'll be doing this week for Halloween ... taking a look back at the cast of this iconic horror film!!

Guess what they look like now over two decades later!

TMZ's Celebrity Pumpkin Stencils Cut It Out!

Carve out some time this weekend to get your perfect pumpkin decorations ready for Halloween!

If you are at a loss for what to create, have no fear, because TMZ is providing you with some of the most killer cutouts this season.

Pay tribute to the many popular celebrities who have been trending this year ... including Britney Spears, Jack Harlow, and Megan Fox (sans her other half, Machine Gun Kelly). Or, you may even want to scare away intruders with a "Squid Game" mask homage!

Hack into this gallery of celebrity pumpkin stencils! Use the links to download and print out an easy-to-use PDF template to get started!

Gourd-eous!

What's The Big Frigin' Difference?

Don't let these two almost identical images of Kourtney Kardashian and Travis Barker sweep you off your feet! Take in all the small things and see if you can keep up with the hidden switches!

The recently engaged couple were spotted showing love for each other -- just a few days after their romantic weekend away in Santa Barbara -- on the streets of New York City ... and we have made a few changes to the original pic! Rock n' roll through this gallery and see if you can commit to the differences between these two super similar snaps!

**HINT -- There are THREE differences in the above photographs!**

Celebrities In Coffins Drop-Dead Gorgeous!

Some celebrities like to bury themselves in their work ... but these scary stars are taking it to a whole new level!

You can find frightening famous faces -- like Stassi Schroeder Clark, Tana Mongeau, and Matthew Gubler -- digging themselves out from the grave and rising up to the surface this Halloween!

Barbara Corcoran, Josh Peck, and Adam Levine are just a few other death-defying celebs getting in the spirit by posing six feet under.

Take a peek inside this gallery of petrifying pics to see all the sinister stars in coffins! Hope you're not claustrophobic!

Breathtaking ... literally.

R.I.P. ⚰️

Guess Who This Costume Kid Turned Into!

Before this costume cutie was dazzling audiences with her performances in film and television, she was just another cute kid clowning around on Halloween in Charleston, West Virginia.

This dressed-up darling is best known as an electric, award-winning actress whose roles throughout her career have ranged from heart-warming romantic comedies to action-packed dramas. Just in time to get you in the mood for spooky season, you can catch this lovable lady dancing along to Michael Jackson's 'Thriller' in one of her most popular movies.

Now, this little jokester will be trick-or-treating with three kids of her own!

Can you guess who she is?

Moaning Myrtle in 'Harry Potter' 'Memba Her?!

Scottish actor Shirley Henderson is best known for playing the ghostly girl Moaning Myrtle -- whose dramatic antics in the bathroom ... and later in a bubbly bathtub ... help the young magicians ward off dark spirits -- in the 2002 film "Harry Potter and the Chamber Of Secrets" and the 2005 installment "Harry Potter and the Goblet Of Fire."

Before her role on the fantasy films Henderson was cast as the party girl who still lived at home Gail in "Trainspotting" and the shy friend Jude in the three "Bridget Jones' films.

Guess what Shirley Henderson looks like now almost two decades from the first Potter film!

Guess Who This Handsome Little Man Turned Into!

Before this smirking sweetheart was plotting out evil plans on television, he was just another cute kid getting his photo taken in Baltimore, Maryland.

This blue boy is best known for his mysterious character who is up to no good on a teen television series set in high school -- whose pilot premiered over a decade ago. Recently, the namesake was picked up by HBO for a progressive new reboot for the next generation.

Now, this bone-chilling actor has returned as the love-crazed star of a highly anticipated third season thriller ... and it's going to be killer!

Can you guess who he is?