http://www.youtube.com/watch?v=T2BKkioVV7o
Haha, nice one. There are a few choir performances of this song, it suits choirs really well doesn't it?!? Here are a couple I knew of, the first being pro, the second just funny.
http://www.youtube.com/watch?v=odHNRjyDMQA (http://www.youtube.com/watch?v=odHNRjyDMQA)
http://www.youtube.com/watch?v=JibX1_CIF7w (http://www.youtube.com/watch?v=JibX1_CIF7w)
the second video really made me smile! really funny and those boys did very well with their dance routines.