Taylor Swift Shows Off Some Skin at Z100's Jingle Ball

Taylor Swift makes an appearance 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.

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