Daryl Davis talks about backing Chuck Berry-- and he'll be doing it again in New York on New Year's Eve. http://www.nypost.com/p/entertainment/music/berry_picking_xA7HvbouqPhjDBDJNTyqUP
Daryl was there when Bruce Springsteen backed Berry back in the 1970s. Springsteen talks about it in "Hail! Hail! Rock and Roll." Since then Davis has made a career of it.