Where did ORIGINAL/REAL Rock n' Roll originate from?

Muddy Waters - 1954
http://www.youtube.com/watch?feature=player_detailpage&v=AFxrLOVwsEE#t=5


Lee Ving (from FEAR) as Piggy (Nada - feat. Piggy) from the movie "Get Crazy" from 1983 or thereabouts
[ame="http://www.youtube.com/watch?v=zRfk3UIjJTQ"]GET CRAZY:Lee Ving & Lori Eastside - Hoochie Coochie Man - YouTube[/ame]