This is actually a very good Christmas song, which is played during the Christmas Parade at Disneyland Paris this year. The copyright dates 2003, so it is a recent song. Most of the lyrics are actually in English, however the song starts with 'Chante, c'est Noel'('Sing, it's Christmas'). The lyrics sound therefore English, as the second line is: 'Sing along, sing a song for Christmas' Hence the confusion. The St George's Chapel Choir is from Windsor