Fuzzy mittens and a crop top? Yes, that is the perfect outfit in this teen winter wonderland.

Jingle Ball, the annual tour that teams up with radio stations across the country to bring together some of pop's biggest names, stopped by Madison Square Garden over the weekend to party with Z100 and iHeartRadio.

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Acts making a splash this year like Daya and the Danish band Lukas Graham joined the likes of Ariana Grande and Justin Bieber for a much-needed dose of escapism.

Here are some of the show's highlights.

The Fifth Harmony takeover is only getting stronger

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The band kicked off the show with a rush of girl power, and, fortunately, that wasn't the last we saw of them. Camilla Cabello came back to sing "Bad Things" with Machine Gun Kelly and the whole group joined DNCE for a holiday sing-along.

Cold Water, both times

With Diplo and Bieber on the bill, fans may have hoped that they would perform their Major Lazer collaboration together. But instead, the song was performed twice, showing its versatility.

MØ joined Diplo towards the end of his set and performed a haunting version of the song sans Bieber. At the end of the night, he performed it solo, strumming an acoustic guitar.

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DNCE gives the people what they want. What they really, really want.

DNCE has known how to work a room since day one. And even though they have a full-length album to work with now, they wisely worked a couple covers into their set to win over children young and old -- "Wannabe" by the Spice Girls and "Fade" by Kanye West.

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Ohmygod, NIALL!

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The One Directioner is playing some of his very first solo gigs on the Jingle Ball tour, and absence has only made the hearts of his fans grow fonder in the first year without 1D. In true Niall Horan fashion, he politely apologized for only having one song right now, "This Town," but he swears more is coming very soon.

Queen Ariana

Ariana Grande, wearing fuzzy ear muffs that nearly swallowed her head whole, came to conquer. Post-Hairspray Live, Grande is back to being the princess and bad bitch with jaw-dropping pipes. She took a minute from her energetic set to slow things down a little with a medley from her holiday EP, Christmas and Chill, before closing out with a reminder that her album Dangerous Womanhas no shortage of bangers.

The Chainsmokers jumped so much

It's not easy to take a time slot between Bieber and Grande, but The Chainsmokers were absolutely the act to do it. They had no trouble riling up the crowd and made Madison Square Garden their own house party for a few minutes, shouting out all the kids from the suburbs who made it out to have a good time.

Biebs is figuring it out

Singer Justin Bieber performs at Z100's iHeartRadio Jingle Ball at Madison Square Garden on Friday, Dec. 9, 2016, in New York. (Photo by Evan Agostini/Invision/AP)Credit: Evan Agostini/Invision/AP

Pop stars, especially with young fans, tend to recite some variation the same few lines about how much they love their loyal fan bases and are living the dream because of them whenever they take the stage.

Bieber's stage banter has taken a turn since he first played to stadiums full of screaming Beliebers, and the ups and downs are well documented, and you could sense a little tension in the air. You could tell Bieber knew people were waiting for him to screw up, but he was there to sing, not make sound bites. Biebs sang and danced through his recent Purposehits and brought out his acoustic guitar for "Cold Water" and "Love Yourself." "Let Me Love You," his recent DJ Snake collaboration played well with the crowd -- the uplifting message is what they needed.

"I could go all night," Biebs told the crowd who seemed to think he was peacing out about 10 minutes before he actually said goodbye. Of course, that's not true -- there are bed times and curfews to observe -- but point made. Bieber's sticking around.

The impromptu sing-along in the stairwell of Madison Square Garden

Leaving the venue, a bunch of teenagers made the best of the post-Bieber traffic in the building's stairwells and began singing Mariah Carey's "All I Want For Christmas Is You" as strangers joined in the holiday cheer.

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