For Meghan Trainor, it's all about that holiday decor. 

In a new video of the Grammy nominee posted on social media, the blond beauty sobs uncontrollably in the backseat of a car while clutching her face.

But, don't fret—they're surprisingly happy tears! 

"I have the best big brother in the world," the "All About That Bass" singer wrote of her reaction on Instagram. "@ryan.trainor surprised me with crazy Christmas decorations because he knows I'm obsessed with Christmas and lights."

Judging from the quick glimpse of the outdoor decor shown in the clip, it looks like her 23-year-old brother hung up multi-colored strands of lights around the home's door as well as a lit-up sign spelling out "Joy."

"It's so pretty," the songstress shrieked. "Thank you, Ryan!"

Trainor previously revealed to Jimmy Kimmel that she shares the house with Ryan and her other brother, Justin Trainor. Somebody get this guy an award for Best Brother of the Year!

Charlie Puth, Meghan Trainor

Dick Clark Productions

While this emotionally-charged video is already on its way to becoming a viral sensation, the record-breaking singer is no stranger to shocking her fans within seconds.

At the 2015 American Music Awards, Trainor joined fellow singer Charlie Puth onstage for a duet of their hit song, "Marvin Gaye." After the final note, the self-proclaimed pals ferociously made out with each other, causing fans' jaws to drop to the floor. The moment was replayed continuously in the days that followed the Sunday night awards show, but both camps swiftly put an end to the buzz—there was nothing going on between them behind closed doors. 

"I have a girl kind of in my life right now that I'm not making too public and I don't want people to get the wrong idea [about the kiss with Meghan]," Puth told USA Today

Still, we have to hand it to her—Trainor certainly has a knack for stunning her audience, whether she's up on an international stage or in the backseat of her car. 

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