Mario Lopez Shares Throwback Christmas Pics with a Cheeky Peek at His Underwear

Included in his wholesome photos was one steamy snap from a holiday season gone by

Mario Lopez's cheeky "TBT" Christmas attire could've landed him on the naughty list!

With the holiday right around the corner, the Saved by the Bell alum, 50, uploaded a nostalgic reel of throwback photos showcasing his and his family’s past traditions.

The video, shared to his Instagram Story on Thursday, began with an old photo of the television host decked out in nothing but a black T-shirt — and a pair of holiday-red underwear.

He wore the underwear, which showed more than a fair amount of his butt cheeks, while he ornamented his Christmas tree with a topper. A toddler, who appears to be his now-13-year-old daughter Gia, held his ankles while he decorated.

Other snapshots in the slideshow show Lopez, his wife, Courtney, their three kids (along with Gia, Lopez and Courtney also share sons Dominic, 10, and Santino, 4) and their adorable dogs, one of which died last year.

It’s clear from the pictures — including one of the family decked out in Christmas pajamas and another showing Lopez in a Santa beard and hat — that the quintet is fully committed to the festivities.

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They even celebrated the occasion early this year by spending it with one of the icons of Christmas: Mariah Carey. Lopez, Courtney and their brood attended the singer’s Merry Christmas One and All! Shows to ring in the joy.

On Thursday, Lopez also posted an old video of him and his squad dancing a choreographed routine to a sped-up version of Ariana Grande’s holiday tune “Santa Tell Me.”

Of course, they also wore matching jammies — black T-shirts, plaid pants and slippers — while dancing in front of an opulent white Christmas tree.

Related: Mario Lopez Gets into the Holiday Spirit as He Celebrates Thanksgiving with His 3 Kids

For any holiday, Lopez goes all in. Last month, he revealed to fans just how he celebrates Thanksgiving.

"We really don't have any staples other than obviously we're all together as a family," Lopez shared on Instagram, adding that they either spend time at his home, "Casa Lopez," or his sister Marissa Wong's house.

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"We just make sure we're all together," he added, demonstrating with an adorable photo of the family of five clad in PJs and piled into one bed together.

The Access Hollywood host said that in addition to the traditional turkey, his family also enjoys Italian and Mexican cuisine on Thanksgiving, as well as lots of "good drinks" and "good movies."

"And relax," Courtney, 41, added. "We're in sweats. We don't get dressed up."

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