we need a christmas song!!!

i was going through a rabbit hole yesterday with 5sos and i noticed they never made a xmas song. after they made 5sos5 i feel they would sound soooo good with making a xmas song like "happy xmas (war is over)" or even tho everyone covers "last christmas" i feel would be good too! what christmas song would you want luke, ash, and or them as a band to cover???