Holidaze

Not exactly Tupac vs. Biggie, but celebs on both coasts tried to outdo each other Monday night, partying hard.

On the East ... Heidi Klum, Kelly Bensimon, Questlove, Alicia Quarles, Jay Pharoah, Jessica Williams, Danielle Brooks, Serena Williams, Deborah Cox, Ice-T, Coco, Bethenny Frankel, Adrienne Moore, Chanel Iman, Tinashe ... and that's just what's in our video.

On the West ... Karrueche Tran, Nas, Snoop Dogg, Bow Wow, Wiz Khalifa, Sofia Richie, Ryan Phillippe and DeAndre Jordan.

A good time ... had by all.

Nick Cannon's answer to questions about Mariah Carey, divorce and/or James Packer ... is Ike Turner.

We got Nick outside the Halloween party at Vandal in NYC, and of course, he got a heavy dose of Mariah. Makes sense ... as we reported, their divorce was just finalized, and now she's in the middle of cutting all ties with Packer.

Luckily for Nick, he was in character as the late Ike ... which allowed him to throw out the perfect response to the questions.

Colton Haynes went to great lengths -- 2 weeks to be exact -- to pull off botched Miss Piggy.

The "Arrow" star went all out soliciting Bitemares makeup artist Erik Porn -- yup, his real name -- to apply the makeup during a 4-hour sitting. Colton and Erik worked together on "Teen Wolf" and Erik gave him the ultimate hookup.

The final product came together Saturday, but the grunt work started weeks before, when the head, chest and neck were molded. When it was all said and done they turned the sassy 'Muppet' into a plastic surgery nightmare.

The TMZ staff turned the year's biggest headlines into Halloween costumes ... with everything from the Johnny Depp and Amber Heard divorce to Blac Chyna and Rob Kardashian's hookup making a showing in the office.

But the award for best in show goes to Kim Kardashian handcuffed in a bathtub with the least tough gang of French burglars. Too soon?

There's even a UFC showdown -- Ronda Rousey, Cyborg and Conor McGregor were repped.

LeBron James has proven yet again that he's serious about his Halloween costumes ... he dropped $5k to make sure his "Martin" inspired look was LEGIT for the Cavs' party ... TMZ Sports has learned.

LBJ hit up Teheran Jones from Exclusive Game in ATL -- who works with big names like Cam Newton and Rick Ross -- to make the Jerome outfit from scratch ... using real MCM bags to make the costume.

All the work paid off ... 'cause Jones says Martin Lawrence personally hit up LeBron just to tell him how he loved the look.

We're told it was a quick turnaround and Jones had one day to complete the order ... and LeBron had to fly his assistant to Atlanta just to pick it up.

#ItsGoodToBeRich

Maria Sharapova, Miles Teller, Joanna Krupa and a bunch of other celebs went undercover Sunday for a big Halloween shindig.

They all descended on the Just Jared party in Silverlake, the hopelessly hipster area of L.A.

Diddy's sons hosted a Halloween bash this weekend with big poppa and a grip of celebs in tow ... but it turned into a teary-eyed affair after a mob bum-rushed the gates.

The Combs brothers -- Justin and Christian -- reigned in some of hip-hop's finest Sunday night at the Taglyan Cultural Complex in Hollywood, with the likes of Chris Brown, Amber Rose, Bow Wow and Meagan Good showing up in costume. Chris had the best one ... as Deadpool.

But the night turned sour for a bunch of would-be party crashers, who rushed the front gates when Justin and Christian rolled through. Security let the pepper spray fly ... and all hell broke loose.

The mob attack was a spectacle, for sure, but it couldn't keep Diddy and his boys down on Halloween.

The Cleveland Cavaliers had their annual Halloween party Sunday night ... and it was nothing short of epic ... with several HUGE talking points that need to be addressed:

Grab your tissues, everybody ... R.L. Stine -- the author dedicated to scaring kids -- has a tearjerker of a story.

We caught up with the "Goosebumps" author Friday in NYC where we asked him for tips on Halloween costumes. Check out the vid ... R.L. gets all heartbroken telling our photog about the costume he was forced to wear as a kid.

Playboy employees livened up their Beverly Hills offices by decking out their cubicles with some dead-on decorations ... and yes, that's partly a reference to Anna Nicole Smith.

There's a huge hole to fill in the Playboy universe because the Mansion's annual Halloween bash was canceled this year -- so Playmates Kennedy Summers, Stephanie Branton and Miriam Gonzalez got their kicks at the corporate office instead.

The ladies judged the staff's Halloween decorations, which you can see for yourself in the gallery.

Along with a tribute to "Stranger Things" and a Playmates graveyard ... there was a "dead" strip club with a "coked-up" champagne room. Trump even showed up.

Top honors went to the video dept. for their looping horror show.

The Tennessee Titans cheerleaders got into the Halloween spirit Thursday night -- breaking out all sorts of sexy costumes ... while the guys put a hurtin' on the Jaguars.

Sexy superheroes? Check.

Sexy "Game of Thrones" character? Check.

More action on the sidelines than on the field? Yup.

The New York woman who's got Hillary Clinton's head on a stake in her front yard says people are threatening to burn her house down.

Eileen Fuscaldo of Bellmore, NY tells us she's getting hammered by passersby who are threatening to turn her house into a pile of ashes ... because they're offended by her Hillary-themed haunted house.

You gotta see the place -- it's strewn with Halloween decor and Hillary's face plastered all over.

Watch -- Eileen's pad has already fallen victim to a paintball drive-by. She vows not to back down.

#BenghaziGraveyard

The makers of some 'Elf on the Shelf' merch awoke to find a lawsuit ... courtesy of the woman who literally wrote the book on the holiday craze.

Carol Aebersold, co-author of "The Elf on the Shelf: A Christmas Tradition" ... made a fortune selling gear based on the book. But in a lawsuit she says Maureen and Manus McGee have been hawking knockoffs, and even participated in the illegal download of 'Elf' movies.

In the docs, Carol says the McGees even bitch about eBay yanking their listings -- because they're unauthorized -- insisting they have a right to sell their version.

Carol's elf co. is suing for every dime the couple's made in the elf game -- and yes, they want all the "counterfeit" dolls hauled off shelves.

Courtney Stodden's Halloween spirit is what nightmares are made of.

Courtney's clearly riffing off the clown crisis that's ravaged America ... only in her case some simple black tape, fishnet stockings and colorful balloons did the trick.

Oh ... and she's topless.

Sorry, party people ... Amber Rose ain't down to rage for the 5th time in less than a week ... so she just pulled the plug on her Halloween event.

The party was supposed to happen Wednesday night at a mystery location -- Amber's invite only said "details coming." We're told Amber's waving the white flag because she's been going HAM since Friday when she turned 33.

She threw back-to-back house/pool parties Friday and Saturday, then did a full day at Disneyland with her son on Sunday ... and finally -- showing her range -- did a late night at Ace of Diamonds strip club on Monday.

We gotta say, partying is kinda Amber's brand, so it's odd she cancelled. Of course, she's got 5 more days to make good before Halloween.

#Getbackinthegame.