vocal style that would become his trademark. with just minutes before going on air, a studio manager told kasem to simply be himself. within a year he moved to los angeles to deejay and do voiceover work in cartoons. when i came to hollywood, i knew that i would do the kind of things that they do on cartoon shows because that s really like radio acting. in 1969 he introduced his most famous character shaggy from scooby-doo. did about 15 different shows with characters, but none of them as exciting as the man i do or the boy i do on scooby-doo. and the count down begins. number 40. on july 4th, 1970, casem introduced the nation to american top 40. casey, could you please play wa waiting for a girl like you so she knows she s worth the wait. thank you, mark hess. american top 40 became an institution with spinoffs on radio and tv.