Halloween

Hey now, hey now! Kendall and Kylie Jenner made fans' dreams come true with their joint Halloween getup -- bringing "The Lizzie McGuire Movie" finale to life more than 2 decades later.

In the 2003 movie, Hilary Duff plays Lizzie, a middle-schooler on a trip to Rome who’s mistaken for Italian pop star Isabella, leading to an epic stage performance of "This Is What Dreams Are Made Of." As you can see, Kendall and Kylie totally nailed it, lip-synching the classic tune on social media Thursday ... giving fans a huge dose of nostalgia.

Kylie fully embraced her pop star moment as Isabella, belting out the track and giving Kendall’s Lizzie an encouraging look to join in the fun.

Heidi Klum's Halloween bash is always a wild event -- but this year it was totally out of this world!

The supermodel and her hubby, Tom Kaulitz, dressed up as Mr. and Mrs. E.T. -- the extra-terrestrial character from Steven Spielberg's 1982 classic alien film -- for her annual spookfest, which was held at the Hard Rock Cafe in NYC.

Heidi brought E.T. to new heights, recreating the glowing fingertip of the movie's strange but kind visitor from a faraway galaxy. She wore a mechanical E.T. costume head with a portable mouth and eyes, which were controlled remotely by Heidi's handlers.

These spooky stars decked out in Halloween costumes with their entire household, and it's a family affair! Why go to the club for Halloween when you can walk the neighborhood with Hollywood's cutest crews!

It was a Mario Bro's party with Jersey Shore's Deena Nicole who brought the pink with her finest Princess Peach costume, while her hubby and kids dressed as Luigi, Super Mario and Wario.

Tia Mowry snapped a spooky selfie before taking her and her kiddos on an alien adventure, while twin sister Tamera Mowry and her fam were feelin' "The Addams Family!"

American actress Heather Donahue was in her mid-20s when she shot to stardom after she played the teary-eyed student and amateur filmmaker who is featured in the found footage creepy film "The Blair Witch Project" back in 1999.

Heather Donahue shared the shaky screen in the documentary-style scary movie with Joshua Leonard ... who disappears into the haunted forest while looking for a way out, and of course Mike Williams ... who dumps the useless map into the river before being found in the basement in the creepy final moments of the film.

Bill Belichick has himself a catch in Jordon Hudson, literally ... 'cause the immortal head coach and his 24-year-old girlfriend debuted a couples-themed costume this Halloween!

Jordon and Bill posed for a few sandy snaps in the Atlantic -- with BB dressed up as a fisherman, and Hudson as a mermaid.

BB and JH are both sporting huge smiles ... and it's crystal clear they're enjoying the spooky day together!

Kim Kardashian is going way out there for Halloween ... dressing up as an albino alligator in a costume that looks like it took tons of time, effort and money.

Kim K just shared her spooky look for Oct. 31 ... and she's got full body paint transforming her skin into white gator scales ... plus a prosthetic tail and some super long, pointy nails.

Oh, and Kim's topping off her look with custom contact lenses that make her eyes look like a reptile's.

Hailey Bieber and Kendall Jenner are trading in Hollywood for "The Simple Life" ... or, at least, they are for Halloween.

The supermodel and the Rhode Skin founder channeled Paris Hilton and Nicole Richie from their 'Simple Life' days for Halloween ... going so far as to recreate one of the show's most iconic scenes.

Check it out ... Justin Bieber's wife is dressed as Nicole, wearing denim overalls and a pink bra while holding a pitchfork. Next to her, Kendall sports a little denim skirt and halter top while holding a puppy ... bringing to life the reality show's famous poster.

Kylie Jenner's bringing all the Demi Moore vibes this Halloween, totally nailing one of the star’s most iconic photo shoots.

Take a look -- Kylie went all in, recreating Demi's legendary "Striptease" pose from '96, with one leg crossed to cover herself, serving major sultriness right at the camera.

Kylie's giving full-on throwback -- windswept brunette locks, smoldering stare, every bit the spitting image of Demi's iconic look.

Celebs definitely threw some money at their Halloween costumes this year, and to avoid the paparazzi and camera craze ... stars hired their own crews to hard-launch their spooky looks ... and it's all for the 'Gram!

Full-on photo shoots went down for Christina Aguilera, who slayed as Stoker's 'Dracula,' while Keke Palmer stepped up to the throne with her son as Cersei Lannister from "Game of Thrones."

"Beetlejuice" was a fave among stars like Vanessa Bryant and James Charles ... both giving their own renditions and killin' it in the makeup department.

Lizzo crushed the Halloween game this year -- leveling up with several costumes such as a mighty mash-up of Edward Scissorhands and SZA, AKA "Edward SZA Hands."

The singer also painted her entire bod bright red and donned a voluptuous "hunny bunny" body suit corset. She topped off the look with a long blue wig.

She swiped this "Face Card" credit card costume on her social media ... A shoutout to Beyoncé's "Heated" from Bey's 2022 Renaissance album. The Yitty shapewear owner rounded out the costume with a black jumpsuit and held on tightly to some Chanel shopping bags.

The winner of the most adorable Halloween costume goes to ... Dave Portnoy's pups, Miss Peaches and Pete, whose outfits were inspired by WNBA superstar Caitlin Clark!!

Portnoy showed off his famous doggos fit, along with her new adopted brother Pete The Beagle on All Hallows Eve ... with Miss Peaches rocking a Clark jersey with a black wig -- while Pete played the role of the basketball!

The fit even caught the attention of the person who inspired it ... with Clark dropping a comment showing love for Peaches hairpiece!

Paris Hilton's giving fans a sign ... posting pics of herself on Instagram dressed as her close pal Britney Spears -- holding a diary that reads "Bad Bitch" across the cover.

The reality TV star shared several photos of her "...Baby One More Time" inspired outfit ... gray sweater and matching mini-skirt, and a white button-down shirt tied at the bottom to show off her tanned, toned stomach.

Check out the photos ... Paris is putting some cleavage on display -- posing with several sultry looks while leaning back on bright pink lockers. Brit's music vid is a bit more gray than Paris' interpretation, but ya know Hilton had to include her signature color for her shoot.

The celebs are going all out for their Halloween 'fits, and we're rounding up the best costumes from this year's spooky season! Hope your trick-or-treat buckets and bags are empty, 'cuz we're about to fill you up with some Halloween goodies!

No question Tyga had a pro team help pull off his "Tales from the Crypt" look, but he absolutely crushed it, while Alix Earle fully committed to her Cheshire Cat transformation -- posing on a magic shroom 🍄!

The Chainsmokers, Andrew Taggart and Alex Pall, cooked up a spot-on rendition as Remy Ratatouille and Linguini ...

Step aside Sabrina Carpenter and Jenna Ortega, because Madi Monroe and Avani Gregg nailed Sabrina's "Taste" music video impersonation.

And once and for all, click your heels 3 times for Olivia Culpo and Christian McCaffrey's "The Wizard of Oz" costumes!

Rob Kardashian's daughter Dream is proving to be quite the Los Angeles sports fan ... dressing as the late Kobe Bryant for Halloween 2024.

The reality TV star posted his 7-year-old's getup on Instagram Thursday, making it clear the little one's tribute to the NBA legend got his stamp of approval.

In the upload, Dream is wearing Kobe's jersey, decked out in head-to-toe Lakers gold ... even practicing her free throws in a couple shots.

Spooky season is going out with a bang at the TMZ office ... and our staff is pulling out all the stops for Halloween, with costumes from the biggest moments of the year in pop culture ... and some classics too.

Harvey's setting the tone as Lana Del Rey's alligator tour guide husband Jeremy Dufrene ... and we've also got a fun spin on Justin Timberlake's DWI arrest.

Post Malone's getting a shout-out ... and we've got his favorite NFL team covered, with a trio of Dallas Cowboys cheerleaders.

Shawn Mendes is getting into the Halloween spirit ... putting up some last-minute decorations at his Los Angeles home ahead of the spooky holiday.

Check it out ... the singer, with the help of his sister, Aaliyah, draped the front yard of his L.A. pad in fake cobwebs Wednesday ... getting the abode ready for the slew of trick-or-treaters set to hit the streets Thursday evening.

As to why Shawn waited so late into October to decorate, it's safe to assume his tour -- which had him on the road for most of this month -- factored into his decorating plans.