"The choir of children sing their song. They've practiced all year long. Ding dong, ding ding dong. Simply having a wonderful Christmastime..." (as the song goes)
It's hard to imagine a choir of children practising any Christmas song all year long, but when the only words seem to be "ding dong ding dong ding dong" it becomes even harder to imagine them singing it with any feeling by the time Christmas comes around.
Perhaps the only thing that could be worse is to be the choir leader of a group of children doomed to practise "ding dong ding dong ding dong ding dong" all year long, and the relief that Christmas is finally here and the knowledge that the children can finally get the wretched performance over with will surely be tainted by the certainty that they must start practising again as soon as the new year starts.