End of the road by U-kiss (i think it was original sang by Boys 2 Men though but I am not sure!) because that's the last performance that Alexander was in before he left the group. All the guys were crying and so was he. I miss you Alexander!! :(.

Here is the video, I will warn you though, you will cry! :(

http://www.youtube.com/watch?v=rOaGHKJGWds