Katy Perry just debuted her first-ever Christmas song for the latest H&M ad for its new holiday line, and you can already tell the catchy tune is going to be a huge hit!

Perry is the face of H&M's Happy and Merry Holiday Campaign, and the upbeat song, "Every Day Is A Holiday," will be playing in stores everywhere until mid-January, according to the New York Daily News. The commercial is loosely modeled after "The Nutcracker," as Perry, who switches back and forth between a sparkly fairy with gorgeous rainbow hair and a nutcracker outfit, dances alongside life-sized gingerbread men, nutcrackers, elves, ornaments, Christmas trees, snowflakes and teddy bears.

Joining H&M was a no-brainer for the 31-year-old pop star, as she's been a huge fan of the clothing brand for a long time. "I swear, I'm not pitching anything to you here, but when I was a teenager, we didn't have a lot of money, and H&M really changed the game for me," she told Yahoo! Style. "I would go to thrift stores, and I would go to H&M and I would put outfits together for myself, and I feel like I looked like a hundred dollars when really, I'd spend maybe $30. And I can still do that now with their clothes! It made a huge difference in how I felt about myself as a kid, and that's such a big deal to me, and it's a big reason why I'm so excited to do the campaign. I'm not trying to sell it, I'm just honestly telling you, it was a big part of my teenage years. A positive part."

"I had such a festive time shooting this larger-than-life holiday commercial with [director] Jonas Akerlund and all of the fun clothes, especially my favorite, the Elfie Selfie sweater," Perry said in the ad's official press release. "I can't wait for you guys to give your wardrobe some sparkle with this magical holiday collection."

While Perry may be one of the hottest names in the music industry, she and Taylor Swift have had some very public beef. Swift's song "Bad Blood" is even rumored to be about Perry, and this new holiday ad shows that Perry might have copied Swift with one particular sexy moment. At one point in the ad, you see a shirtless man in a Santa hat holding a kitten sitting on top of a red car, and it turns out this is one of Swift's pals, according to E! News. The hot male model is Sean O'Pry, who was the guy from Swift's "Blank Space" video. While it's most likely a coincidence, fans quickly took to social media to point out the familiarity.

"Katy Perry stole Taylor Swift's 'Blank Space' guy," one user jokingly tweeted. "The lawsuit is coming!"

Watch the festive holiday ad below!