(AP) - Dick Clark, the ever-youthful television host and tireless entrepreneur who helped bring rock 'n' roll into the mainstream on "American Bandstand," and later produced and hosted a vast range of programming from game shows to the year-end countdown from Times Square on "New Year's Rockin' Eve," has died. He was 82. Spokesman Paul Shefrin said Clark had a heart attack Wednesday morning at Saint John's hospital in Santa Monica, a day after he was admitted for an outpatient procedure. Clark had continued performing even after he suffered a stroke in 2004 that affected his ability to speak and walk. Long dubbed "the world's oldest teenager" because of his boyish appearance, Clark bridged the rebellious new music scene and traditional show business, and equally comfortable whether chatting about music with Sam Cooke or bantering with Ed McMahon about TV bloopers.He thrived as the founder of Dick Clark Productions, supplying movies, game and music shows, beauty contests and more to TV. Among his credits: "The $25,000 Pyramid," ''TV's Bloopers and Practical Jokes" and the American Music Awards. For a time in the 1980s, he had shows on all three networks and was listed among the Forbes 400 of wealthiest Americans. Clark also was part of radio as partner in the United Stations Radio Network, which provided programs - including Clark's - to thousands of stations.