television. i studied him as a kid, and i had the fortunate opportunity to work with him for several years on new year's eve. and so, i'm sad and i'm grateful for what he's given all of us and certainly what he's given me. >> reporter: other celebrities are turning to twitter. from rapper snoop dogg -- "rest in peace to the dick clark. you were a pioneer and a good man. thank you, sir." and singer gloria estefan wrote, "our sincerist condolences to dick clark's wife, kari, his family and all who loved and admired him, which includes the whole estefan clan." landau used to be a dancer on "american bandstand." >> he was like a second father. he was there for all of us. he loved us, and we loved him. >> reporter: when news of dick clark's passing hit the world, it came as a shock to many fans used to his ageless boy next door looks that masked his true age of 82. >> he always looked so young. i haven't seen him in a few years, but i remember when i used to watch him growing up, he