'Tis the season for Fa-la-la-ing and Jingle Bells-ing, for croaking out, in other words, those oh-so-traditional Christmas carols. But how far back do these carols - and the tradition of singing Christmas carols in general - actually go? In some instances at least, not all that far, according to a . Read more: O come all ye tone-deaf - if only once a year () And while you're reading, be sure to have yourself a very merry Christmas!