what is the best rock n roll song of all time?

I'm a huge Yes fan. Anderson/Squire/Howe/Wakeman/White made up the best band era in rock history, speaking from a pure talent standpoint.

http://www.youtube.com/watch?v=7WDkdZ6QvXY]

http://www.youtube.com/watch?v=lFOOQ8e5J3A

http://www.youtube.com/watch?v=DKftiJS30Cs

http://www.youtube.com/watch?v=uJM7TdshUbw

Acoustic Set they did. Skip the first 5 minutes or so as they are just fooling around being silly.

http://www.youtube.com/watch?v=DucC91dJepQ