Once inside, the 9-year-old tosses the bomb and suddenly, boom, the RV is transformed into a winter wonderland decked out in fabulous holiday decor; with everything from holly to stockings to their cute pup wearing antlers.
"Our merry little road trip with @outdoorsy#GetFestive 🎄🎉❤️," Mariah captioned the hilarious holiday video.
Rocking red plaid pajamas and a facemask, the Elusive Chanteuse can be heard saying, "So we're on our festive road trip making our way across the land, celebrating and staying safe, seeing so many familiar places."
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She then screams with delight at the first sight of snow, adding, "This is the best way to be outdoors... but not really be outdoors."
The video ends with the RV pulling up to a sign that says, "Welcome to Aspen."
"After I kind of emerged from my first relationship–slash–marriage, I created the Christmases that I wanted to have," she told Elle, adding that she now goes to a "snowy place" for the holiday every year.
"I'm not making this up. Santa Claus comes, hangs out with the kids," she explained. "And by the way, even if I didn't have kids, I would be doing this."
"I do live from Christmas to Christmas; it's the only thing I look forward to every year," Mariah added. "Well, it's not the only thing ... but it's truly the best time of year for me."