The person said Jackson died in a Los Angeles hospital. The person was not authorized to speak publicly and requested anonymity.
The circumstances of his death were not immediately clear. Jackson was not breathing when Los Angeles Fire Department paramedics responded to a call at his Los Angeles home about 12:30 p.m., Capt. Steve Ruda told the Los Angeles Times. The paramedics performed CPR and took him to UCLA Medical Center, Ruda told the newspaper.
Jackson's death brought a tragic end to a long, bizarre, sometimes farcical decline from his peak in the 1980s, when he was popular music's premier all-around performer, a uniter of black and white music who shattered the race barrier on MTV, dominated the charts and dazzled even more on stage.
His 1982 album "Thriller" — which included the blockbuster hits "Beat It," ''Billie Jean" and "Thriller" — remains the biggest-selling album of all time, with more than 26 million copies.
He was perhaps the most exciting performer of his generation, known for his feverish, crotch-grabbing dance moves and his high-pitched voice punctuated with squeals and titters.
His single sequined glove, tight, military-style jacket and aviator sunglasses were trademarks second only to his ever-changing, surgically altered appearance.
As years went by, he became an increasingly freakish figure — a middle-aged man-child weirdly out of touch with grownup life. His skin became lighter and his nose narrower. He surrounded himself with children at his Neverland ranch, often wore a germ mask while traveling and kept a pet chimpanzee named Bubbles as one of his closest companions.
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AP Timeline of Michael Jackson's life