After performing a radio concert, Taylor Swift celebrated her 30th birthday on Friday (December 13).

Friends and family were by Swift's side during an epic and star-studded Christmas-themed birthday party at New York City's Oscar Wilde restaurant.

"Happy birthday but make it Santa," the pop star captioned a photo from the party on Instagram, posing with some of her friends and tourmates.

Swift wore a black sequin mini-dress and "Birthday Girl" tiara, along with a string of Christmas lights for a necklace.

At one point during the party, the "Lover" singer donned a green Christmas tree vest for some unforgettable photo booth snapshots.

The 30-year-old birthday girl reportedly gave out custom Santa hats that read, "30th Thir-TAY."

Guests at Swift's party included Halsey, Camila Cabello, Jack Antonoff, Blake Lively and Ryan Reynolds.

"I have no idea what was happening here. Birthday angel turned Thir-tay," Halsey wrote on Instagram.

Queer Eye stars Antoni Porowski and Jonathan Van Ness also came to party with Swift.

Swift's longtime bestie, Abigail, for whom Swift was a bridesmaid, was also (obviously) in attendance.

"Thir-tay never looked so good," Abigail wrote on Instagram.

Swift's cake was just as extravagant as expected, featuring red and white roses along with her three cats, Meredith, Olivia and Benjamin. "Fur real guys, this was my cake," the singer wrote on Instagram.

Another famous attendee, Todrick Hall, sang "Happy Birthday" to Swift as she blew out her sparkler candles.

"Taylor is my beard," Hall joked on Instagram alongside a photo of Swift donning a white Santa beard.

"Honestly spending my 30th with the fans who have made my life what it is at jingle ball, then throwing the most aggressive holiday party known to womankind... I just.. seriously feel so lucky for you all and will spend forever trying to find ways to say thank you. *cries in Christmas tree*," Swift gushed on Instagram alongside images from her party.

Swift was born on December 13, 1989.

And Christmas spirit runs in her blood: Swift was actually raised on a Christmas tree farm!