The mention of Christmas tunes reminds me that from September to November, I couldn't get "Gören portarna höga" by Gunnar Wennerberg out of my head, and kept singing it in the car. It is not really a Christmas song, but for some reason, it is usually sung around Christmas in Sweden. I don't think it is very well known outside Sweden and I couldn't find the whole song for you anywhere, but I found a sample at [
www.amazon.co.uk]
Oh, it just stuck in my head again!