My 2nd song would probably be Sick Puppies - All the Same(free hugs). (an amazing song if I might add). http://www.youtube.com/watch?v=vr3x_RRJdd4 Watch the video at 1:10. It has to be the most hilarious part of the video, a guy walks by him and takes a double take and says "What the hell".
I'm gonna have to be a loser here and say Mozart's Requiem - the entire mass actually. I couldn't pick one movement. It's sad and depressing but amazing at the same time. Mad World is also a gooder...Gary Jules did it way better than Tears for Fears.