On the 24th (unless you're on the other side of the International Date Line), King's College, Cambridge with once again present its annual Festival of Nine Lessons and Carols at 3:00 pm GMT. If you can't receive it otherwise, you may stream it over the internet. There are a number of stations which do this. It is a moving experience which I would recommend to all.
http://www.weta.org/fm/listenlive
http://kbaq.org/listen/ontheweb
Adjust your time according to your location.
You can download the service booklet here http://www.kings.cam.ac.uk/events/chapel-services/nine-lessons.html
Until then you might enjoy http://www.youtube.com/playlist?list=PL789CCBB76461F5F0
BTW: If you don't understand and want to read the words, they are available by clicking "Show more" under the image.