2014 Jingle Ball | Entertainment News, Photos, and Videos

Taylor Swift lets the audience sing along during her live performance at the 2014 Z100 Jingle Ball at Madison Square Garden on Friday afternoon (December 12) in New York City.

“This is my last tweet as a 24-year-old. #casual,” the now 25-year-old singer tweeted before hitting the stage.

PHOTOS: Check out the latest pics of Taylor Swift

Earlier that night, Taylor showed off some skin as she arrived on the red carpet for the big event.

FYI: Taylor is wearing a Jessica Jones top and pants, Jimmy Choo boots, Suzanne Kalan earrings, a Borgioni double point ring, a Jack Vartanian Pavé spike ring, and Sethi Couture Pavé bands.

15+ pictures inside of Taylor Swift during her performance at the Jingle Ball…More Here! »

Ariana Grande shows some skin in her white outfit while performing on stage at 2014 Z100 Jingle Ball on Friday evening (December 12) at Madison Square Garden in New York City.

The 21-year-old singer was joined on stage during the show by Jessie J to perform their Grammy-nominated song “Bang Bang.”

Ariana dropped the music video for her Christmas song “Santa Tell Me” while she was on stage.

“been exhausted & a lil drained.. thank u my sweet luvs, i’m sorry i’ve been a lil mia. sending u hugs. remember ily!!! even when im quiet ☁️,” Ariana tweeted to her fans that day.

15+ pictures inside of Ariana Grande performing at Jingle Ball… More Here! »

Nick Jonas poses backstage before hitting the stage at 2014 Z100 Jingle Ball on Friday evening (December 12) at Madison Square Garden in New York City.

The 22-year-old singer’s older brother Kevin Jonas with his wife Danielle came out to show their support at the event. Other stars in attendance were Calvin Harris, Shawn Mendes, and Ryan Tedder of OneRepublic.

Nick recently told NY Post‘s Alexa Magazine whether or not he gets “jealous” like he says in his song.

“I think earlier on in my relationship, there were times where I would get jealous,” Nick said. “I think with time and trust built up, a lot of that went away. We have a really strong relationship now. It takes a second until you feel really locked in with someone.”

Iggy Azalea looks red hot while walking the carpet at 2014 Z100 Jingle Ball on Friday evening (December 12) at Madison Square Garden in New York City.

Also in attendance at the event were Jessie J and Rita Ora, the latter of whom also stopped by the All Access Lounge earlier in the day.

That afternoon, Iggy was seen stopping by the Billboard Women of the Year event.

Iggy took to her Twitter account last night to respond to some ridiculous rumors that were spreading about her reportedly being born a man named Cody. Read below!

FYI: Rita is wearing a Ulyana Sergeenko body suit, ASK’A shoes shoes, Erickson Beamon earrings and rings and Fenton/Fallon jewelry for the main event.

Click inside to read the rest of Iggy Azalea’s tweets on the rumors… More Here! »

Taylor Swift shows off some skin in a cut-out dress at the 2014 Z100 Jingle Ball at Madison Square Garden on Friday evening (December 12) in New York City.

The 24-year-old pop singer is set to perform during the big bash to kick off her 25th birthday weekend.

PHOTOS: Check out the latest pics of Taylor Swift

In celebration of Taylor‘s birthday, her best friend Selena Gomez got her nails done with an S and a T in a heart on two separate fingers.

“I mean it’s my bff birthday weekend so…. @taylorswift #NYC @sweetbcreations for doin me up :),” Selena captioned the picture, inside.

FYI: Taylor is wearing a Reem Acra dress and Jimmy Choo shoes.

25+ pictures inside of Taylor Swift hitting up the red carpet in NYC…More Here! »

Adam Levine makes his arrival at 2014 Z100 Jingle Ball at Madison Square Garden on Friday afternoon (December 12) in New York City.

The 35-year-old Maroon 5 frontman was joined for some pictures on the red carpet by his bandmate James Valentine.

PHOTOS: Check out the latest pics of Adam Levine

Earlier that day, Adam made his way to the gym in the chilly Big Apple weather.

Recently, Adam revealed how many kids he wanted to have with his wife Behati Prinsloo.

“Like 17. Is that reasonable?,” he told E! Online. “I love kids so much, though. I love seeing kids on the set, too.”

15+ pictures inside of Adam Levine in NYC…More Here! »

Gwen Stefani is all smiles while carrying her son Apollo backstage at 2014 Z100 Jingle Ball held at Madison Square Garden on Friday (December 12) in New York City.

The 45-year-old singer was also spotted hanging out with fellow The Voice judge Pharrell Williams, who will most likely bring her onstage to perform their new single “Spark the Fire” at the concert.

PHOTOS: Check out the latest pics of Gwen Stefani

After the concert, Gwen and Pharrell will be headed back to Los Angeles for the season seven finale of The Voice on Monday (December 15).

Check out an exclusive video of Gwen, Pharrell, Adam Levine, and Blake Shelton sending out a special message to the Troops as a part of WWE’s Tribute to the Troops, which celebrates servicemen and women’s dedication and commitment to our country. The tribute will air on Wednesday (December 17) on USA Network and re-air as a one-hour special on NBC on Saturday, December 27, from 8-9pm ET.

FYI: Gwen is wearing a Vita Fede ear jacket and ring, and Melissa Kaye Jewelry rings.

15+ pictures inside of Gwen Stefani and Pharrell Williams at Z100 Jingle Ball…More Here! »