Day 23 - A Who-related YouTube video
There's a good few to pick from but timelordfromhell's pisstake of The End Of Time really does trump them all ....
Spoof 1:
http://www.youtube.com/watch?v=RU6aKJ2SrlsSpoof 2:
http://www.youtube.com/watch?v=CASICuZZJ6o