I was at a concert by a group called St Agnes Fountain, whose members pursue solo careers during the rest of the year but in December they get together to perform Christmas music both traditional and new. They were singing a song one of the group had written, which had a refrain that went 'We're home for Christmas now, hallelujah'. As the song ended I was wondering how many others in the audience were thinking of Leonard Cohen, when one of the band called out "Come on now, all together, you know you want to", and they launched into the Leonard Cohen Hallelujah chorus with no further introduction. They were immediately joined by pretty much the whole of the rest of the audience, so I guess that answered that question

And it can't all have been down to X-Factor - can it?