The new Taylor Swift is smmmmoking hot!

Swift performed before a sold-out crowd at KIIS FM's 2017 iHeartRadio Jingle Ball event at the Forum on Friday, marking her first major public performance in almost a year and first major gig that included songs from her new album Reputation. With her new dance moves and new look, the singer gave fans a taste of what to expect on her 2018 tour.

Keeping up with her new signature snake-themed style, Swift wore a loose-fitting sequined snakeskin-print shirt over black shorts—an edgier, and likely more comfortable style than the skintight and skimpy crop tops, short shorts, mini skater skirts and rompers she wore on her 1989 tour.

"Last night was funnnn," Swift wrote on Instagram on Saturday afternoon. "Thank you to everyone who came to KIIS-FM Jingle Ball YOU WERE SO LOUD! And dancy. And wonderful."

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Swift got onstage around 11:30. Snakes appeared on a screen as she made her entrance. She performed for about 30 minutes, singing the Reputation tracks "...Ready for it?," "Look What You Made Me Do" and "End Game," the latter of which she sang onstage for the first time and as a surprise duet with BFF Ed Sheeran

"So I had an album called Reputation just come out very recently and there's a song I'm so excited about that I've never played it live before. If you're excited enough, a special guest may show up," Swift said, before introducing Sheeran, spurring cheers and screams from the crowd. The two shared a hug before he left the stage.

Swift also performed her fan-favorite hits "Blank Space," "Shake it Off" and an acoustic version of "I Don't Wanna Live Forever"—her duet with Zayn Malik, who was not present.

"I want to be upfront...he's not here but I want to do my part," Swift told the crowd. "It just got nominated for a Grammy and we're really excited."

Other performers at Friday's show included Halseywith special guest Lauren Jauregui from Fifth HarmonyCharlie PuthDemi LovatoSam SmithLogicThe Chainsmokers and Liam Payne and Niall Horan, who performed separately but did have a mini One Direction reunion backstage. Payne gave his friend a shout-out onstage, saying, "You guys already saw Niall. What a great set he had."

Kesha and Macklemore performed their song "Good Old Days" and she also sang her hit ballad "Praying." The singer thanked her fans for being loyal throughout her career including during "the past couple years that have been a bit of a bitch."

Presenters included Nicole RichiePatrick Schwarzenegger,  Bella ThorneJames CordenSarah HylandFrancia Raisa and Ryan Seacrest.

Other celebs spotted at the event included Vanderpump Rules stars Tom Sandoval and Ariana MadixBachelor Nation members Vanessa Grimaldi, Becca Tilley, Ashley "I" Iaconetti, Dean Unglert, and Rachel Lindsay and fiancé Bryan Abasolo. The latter two arrived at The Forum holding hands and looked excited. They stayed close while checking out items in the celebrity lounge and also caught up with host Chris Harrison and shared a few laughs, E! News has learned.

Flip or Flop's Tarek El MoussaThis Is UsChrissy MetzScandal's Bellamy YoungBrad GoreskiTyler Oakley and couple Lance Bass and Michael Turchin also attended.

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