We sang Carol of the Bells every year in Varsity 'cept my junior, and everyone was all looking forward too it then my choir teacher said we did it too often. We wern't to happy.

Oh god rest Ye Merry GentleMen, Oh Come Oh Ye Faithfull, Oh Holy night..

Basically almost all of the church esque songs, then Bing Crosby songs! =D!