Taylor Swift Celebrates 25th Birthday With Many Stars, Including Justin Timberlake, at 2014 Jingle Ball After Party—See Pics!

The singer had performed at a previous Jingle Ball in Los Angeles last week.

Happy birthday Taylor Swift!

The pop singer turned 25 on Saturday and celebrated the night before at her apartment in New York with several of celebrity pals, including Beyonce and husband Jay Z, Justin Timberlake, Selena Gomez, Victoria's Secret model Karlie Kloss,Chrissy Teigen, Nick Jonasand girlfriend Olivia Culpo, Charlie XCX, Shawn Mendes, Ansel Elgort, Sam Smith, Jaime King, Iggy Azalea and the band 5 Seconds of Summer and the sisters from the group Haim, E! News has learned.

Swift and most of the others had performed or appeared at the 2014 iHeartRadio Jingle Ball, hosted by Z100, in the city that day, making her bash an impromptu after party.

Swift posted two group photos showing some of her famous guests on her Instagram page. Timberlake is wearing a hat that resembles the fan-favorite poop emoji.

"So this is being 25..... #WHAT #bestbirthdayEVER," Swift said. 

Three guys were spotted exiting an SUV outside the bash and delivering about 40 pizzas, while Charli XCX and Smith were seen bringing instruments with them, E! News has learned. A source said Timberlake arrived carrying a David Bowie album and one of the members of 5SOS brought along a huge teddy bear.

Personal security guards were everywhere. Beyoncé and Jay Z left around 4:50 a.m., while Gomez, King and Kloss remained inside at that time.

xx

Uma foto publicada por Sam Smith (@samsmithworld) em Dez 12, 2014 at 5:40 PST

Happy Birthday @taylorswift that was so fun last night! @oliviaculpo

A photo posted by @nickjonas on Dec 12, 2014 at 8:39am PST

These people are cool ??... @oliviaculpo @anselelgort

A photo posted by @nickjonas on Dec 12, 2014 at 8:44am PST

At her party, Swift wore her stage outfit from the Jingle Ball—a sparkling, red and black plaid retro-style crop top and matching pants. She asked the audience for a very special birthday present.

"I'm the only person tonight who will ask you to scream loudly, who's about to turn 25 in about 10 minutes," she told the screaming crowd, doing a little dance, before launching into her 2012 hit "We Are Never Getting Back Together."

Swift had also received another special birthday present earlier this week—she was serenaded by none other than the Queen of Soul herself, Aretha Franklin!

Swift arrived at the Jingle Ball in a wine, Grecian-style, one-shoulder cutout dress.

The event was held almost week after a Jingle Ball concert was held in Los Angeles. Swift had performed there as well and also donned two chic looks.

 —Reporting by Michelle Falls, Jennifer Cooper and Beth Sobol