line-ups don't get any bigger

Kiss FM is holding its second annual Christmas concert in Boston, and this year's line-up is packed with the pop world's biggest names. Taking place at the TD Garden, the bill is topped by Iggy Azalea and the newest rivals to One Direction's crown, 5 Seconds of Summer. Also performing are rockers OneRepublic, Charlie XCX (so expect a team up with Iggy on 'Fancy') and the UK's finest pop export, Jessie J. And if that wasn't enough, the night will be presided over by a special guest host, the newly solo Nick Jonas.

The full line-up is: 5 Seconds of Summer, Iggy Azalea, OneRepublic, Meghan Trainor, Magic!, Charli XCX, Jeesie J, Rixton, Lil Jon, Shawn Mendes and Kiesza.