On my dashing round the country tour, last night I was at a carol service where "O Holy Night" was sung as a solo.
That song always (however well it is sung) reminds me of this rendition, which is hilarious.
NB - since I don't currently have access to my ftp server (being on tour and all), I "borrowed" the link from this page. And yes, I did check that their audio host gives unmeterd bandwidth... I don't seen any reason for them to complain, but if they do, I'll happily remove that link.