"I said one day we're going to have this experience. And when Anna Nicole Smith passed away, I said we cannot have this kind of thing with Michael Jackson," Brian Oxman, a former Jackson attorney and family friend, told NBC's "Today" show. "The result was I warned everyone, and lo and behold, here we are. I don't know what caused his death. But I feared this day, and here we are."

Oxman claimed Jackson had prescription drugs at his disposal to help with pain suffered when he broke his leg after he fell off a stage and for broken vertebrae in his back.

The worldwide wave of mourning for Jackson continued unabated for the man who revolutionized pop music and moonwalked his way into entertainment legend.

"My heart, my mind are broken," said Elizabeth Taylor, who was one of Jackson's closest friends and married one of her husbands at a lavish wedding at the pop star's Neverland Ranch in 1991. She said she had heard the news as she was preparing to travel to London for Jackson's comeback show, and added, "I can't imagine life without him."

Hundreds made a pilgrimage to the Jackson family's compound in Los Angeles, leaving flowers and messages of love. They did the same at his star on the Hollywood Walk of Fame and at the home in Los Angeles' Holmby Hills where Jackson was stricken. Some camped out overnight.

In New York, people stopped at Harlem's Apollo Theater, where Jackson had performed as a child with his brothers in one of rock's first bubblegum supergroups, the Jackson 5.

Scores of celebrities who knew or worked with Jackson — or were simply awed by him — issued statements of mourning. Some came through publicists and others through emotional postings on social networking sites like Twitter and Facebook, where countless everyday fans were sharing memories as well.

"I truly hope he is memorialized as the '83 moonwalking, MTV owning, mesmerizing, unstoppable, invincible Michael Jackson," said John Mayer. Miley Cyrus called him "my inspiration."

And Diana Ross, the former lead singer of the Supremes who introduced the Jackson 5 at their debut on "The Ed Sullivan Show" in 1969, said she could not stop crying. "I am unable to imagine this," she said. "My heart is hurting."

His two ex-wives both said they were devastated. One of them, Lisa Marie Presley, posted a long, emotional statement on her MySpace page in which she said her ex-husband had confided to her 14 years ago that he feared dying young and under tragic circumstances, just as her father, Elvis Presley, had.

"I promptly tried to deter him from the idea, at which point he just shrugged his shoulders and nodded almost matter of fact as if to let me know, he knew what he knew and that was kind of that," Presley said.