Celebrate Christmas with the biggest line-up of the year!

Z100 is holding its second annual Christmas concert, and this year's line-up is packed with the pop world's biggest names. Taking place at Madison Square Garden, the bill is topped by pop giants Taylor Swift, Ariana Grande and Maroon 5. Also performing are Iggy Azalea, Charli XCX (so expect those two to team up on 'Fancy') and the most famous DJ in the world Calvin Harris. And if that wasn't enough, the night is being presided over by guest host Nick Jonas.

The full line-up is: Taylor Swift, Pharrell, Ariana Grande, Calvin Harris, Maroon 5, Iggy Azalea, 5 Seconds of Summer, OneRepublic, Meghan Trainor, Nick Jones (Host), Sam Smith, Charli XCX, Jeesie J, Rita Ora, Shawn Mendes, Rixton and Kiesza.