Given that I'm a teetotal Rock music fan, this is not my usual musical choice... But it's Christmas!
Under The Christmas Star from Stella Artois offers seven jazz flavoured Christmas songs. (Or possibly eight songs if you are still in the first so many hundred thousand downloads). Only restriction is you have to be over eighteen)
facebook page for more details.
As I said, not my usual taste but maybe I'm in a good mood because it's Christmas because I quite like this. And a whole album's worth of Christmas songs for free is not to be sneezed at.