Justin Timberlake and Jessica Biel Reveal the Several 'Naughty' Elf on the Shelf Displays They Set Up for Their Sons on Christmas

Jessica Biel upped her Christmas game with some next-level Elf on the Shelf setups this holiday season.

On Dec. 25, the mom of two posted an Instagram carousel showing some of the creative ways she spices up the holiday for her sons Silas, 9, and Phineas, 4, both of whom she shares with husband Justin Timberlake.

Biel shared a collection of photos and videos of toy elves getting into all kinds of trouble, including one snap of an elf holding a black marker beside framed photos of each of their kids. Facial hair and hats had been scribbled all over their portraits.

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Related: Justin Timberlake and Jessica Biel's 2 Kids: All About Silas and Phineas

Posing as the mischievous elf, Biel penned a note to both kids: "You better stay off the naughty list, or I'll paint your faces FOR REAL, just like this," it read with an arrow pointing to the photos.

The first slide showed one red-suited figure splayed out in what appears to be some sort of kitchen mishap, between the dusting of flour or sugar and spilled mini marshmallows. "Naughty ass elf 😏," the 7th Heaven alumna wrote in her caption.

In a following photo, Biel staged an elf with its arms over a bottle of ketchup and mustard, the same condiments that splattered the "Elf target practice" bullseye hung on the wall in front of it. Later in the carousel, an elf can be seen peeking out from a toaster with a sign reading, "It's toasty in here ... Keep it crispy this Christmas!"

Related: Jessica Biel Seen Dancing at Justin Timberlake's Madison Square Garden Show a Week After His DWI Arrest 

For a truly cheeky prank, the actress draped the festive doll over a bathroom sink and placed a toothbrush between its legs. The "elf" addressed Silas in his note: "Thanks for letting me use your BUTT brush!" read a note in curly handwriting.

In videos, Biel showed their house in various states of disarray, all supposedly caused by the rebellious elf off of its intended shelf. One clip showed their staircase wrapped in faux spider webs dotted with plastic arachnids. Two plush spiders were placed beside an elf hanging upside down from the white material.

In another video, toys like Spider-Man and Buzz Lightyear hung from a doorframe by strings. The elf was secured at the top of the door, appearing to hold the string of yet another dangling figurine.

Related: Justin Timberlake Jokes Sons Silas and Phineas 'Run Our House': 'It's Crazy'

It wasn't just Biel orchestrating behind the scenes either. Timberlake got in on the fun as well, according to an Instagram Reel he shared on Christmas Day. In his video, the elf stood behind a paper a turntable labeled "DJ Fart-Butt." The setup included other mini accessories, like a laptop, speakers and headphones.

Techno music blasted as the singer showed off the elf's DJ booth from all angles. He panned up to his smirking wife and they repeated her original caption: "Naughty ass elf."

"Daddy got ahold of the elf…" Timberlake wrote alongside the musical Reel from his account.

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