In preparation for Christmas and the premiere of this year's remaining Doctor Who specials, the BBC's official Doctor Who website launched their online advent calendar for 2009 last Tuesday. The advent calendar will feature many exclusive treats over the next fourteen days and door number eleven on the calendar is now available to open due to the fact that today is the eleventh of December. Behind today's door, there's a new video of David Tennant and the Proclaimers singing and in total, it has an approximate running time of thirty six seconds. You can view this new video here and content from behind the calendar's previous ten doors can be found here. This year's twelfth door on the calendar will be available to open sometime tomorrow afternoon and details regarding the next special advent treat will be posted here on this site soon. What do you think of this new video?