Its very difficult to say just 1 Fav song here...
I have a list of more that 300 songs in my pc as my Fav...
But here are few
[video=youtube]http://www.youtube.com/watch?v=sGrfLQVVI8A[/video]
[video=youtube]http://www.youtube.com/watch?v=saalGKY7ifU[/video]
[video=youtube]http://www.youtube.com/watch?v=fdsToepb7hY[/video]
[video=youtube]http://www.youtube.com/watch?v=vLJ9fHqDlOA[/video]
[video=youtube]http://www.youtube.com/watch?v=aMGu6457tFY[/video]