and you are getting outkast.> outkast became rap's beatles because we found both but particularly, andre becoming more obsessed with a kind of adventurous landscape of music. >> serious hip-hop already knew about outkast. but then, they have this song called "hey ya." it's barely a hip-hop song, really. i'm not sure what it is, but it's got this kind of frothy, '60s vibe. it sounds like something motown might have put out when they were doing a song of young america. next thing you know, everyone is singing this one line, shake it like a polaroid picture. polaroid was the instant camera and the picture came out. and for some strange reason, as the image was -- was forming, people would do this. they would shake it, as if that was going to make it happen faster. so, he says that line in the song and, suddenly, everyone's doing that. and you have this cultural moment that everybody feels a need to be part of. then, you know you really tap into something, and that's what outkast did. move at your own pace. you can e