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

Probably the best blues rock song of all time:

http://www.youtube.com/watch?v=iP9xMobANJM]

the one song that could rival it, by the same band and same album (best blues rock album of all time, hands down):

http://www.youtube.com/watch?v=iSQv-LoSmEs]