is that mtv is responsible for a complete revolution in the music business in this country. ♪ >> mtv makes the hits. it's as if there were just one national radio station for new songs. >> ending the '80s in terms of rock music you're getting a lot of hair bands. you've got poison, ratt, warrant. ♪ she's my cherry pie cool drink of water, such a sweet surprise ♪ tastes so good make a grown man sweet cherry pie ♪ >> a lot of hairspray going on. there's a lot of sexually suggestive lyrics. it's not particularly deep music, but mtv pushing it. so that's selling. >> when i would turn on mtv, all the rock bangds looked a certain way. they played a kind of music. they were expected to have a certain facade. >> mtv's ratings are surprisingly small but those who do watch, mostly teenagers and young rah dults, buy a lot of records, tapes and cds. and buy the most of what they