My Sounds of Music

I cannot even begin to guess how much time and effort went into this. it's a mashup of the Top 25 Billboard Hits of 2009 and it is BEAUTIFUL! I only know about two-thirds of the songs but even so, it's amazing. I kinda can't stop watching it:


Link (in case the above doesn't work): http://www.youtube.com/watch?v=iNzrwh2Z2hQ