musk by bringing together one of the very first people to bring together blues, country, boogieing wouldy and all these styles into rock 'n' roll. and more porntdly, you know, you look back and people like little richard and jerry lee lewis were very kind of sexual and threatening. and chuck berry really wasn't that. but he did something much more important which is he wrote songs in the voice of the average teenager which really nobody was doing at that point. >> rose: so is his genius as a guitarist or songwriter. >> it's both. you know, that lick, the one finger, slippery little lick that we hear, you know, it lives on in the music, he invented that. and he played music, he played guitar on different down beats an things. so he kind of revolutionized the sound. that famous chuck berry lick we hear in every song, everybody still duplicates, nobody was doing that before him. oh maybe lean. ♪ why can't you be true. oh maybe lien. ♪ can can't you do be true. >> rose: so that is a real basic building block of modern rock 'n' roll. >> so he seasoning writers likeo bruce springsteen and g