Michael Jackson, 50, died Thursday in Los Angeles as sensationally as he lived, as famous as a human being can get. He was a child Motown sensation who grew into a moonwalking megastar, the self-anointed King of Pop who sold 750 million records over his career and enjoyed worldwide adoration. But with that came the world’s relentless curiosity, and Jackson came to be regarded as one of show business’s legendary oddities, hopping from one public relations crisis to another.