Tributes from stars and fans have been pouring in for singer Michael Jackson, who has died aged 50 after suffering a cardiac arrest at his Los Angeles home.
Pop star Madonna said: "The world has lost one of its greats, but his music will live on forever."
Fans gathered outside the clinic where he was pronounced dead on Thursday. A post-mortem is taking place on Friday.
Family lawyer Brian Oxman told US TV that he had been concerned about the star's use of pain relief medication.
Mr Oxman told ABC's Good Morning America programme that Jackson took prescription pain relief for injuries sustained earlier in his career, including bones broken in a stage fall.
Jackson lawyer's 'medication warning'
"It caused him great pain. He just didn't like to feel such discomfort. He started taking pain medication. It became part of his life."
Mr Oxman added that he had warned that he "would not hold his tongue" about Jackson's use of medication in the event of the singer's death.
US authorities have said final results of the post-mortem could take up to eight weeks, while toxicology tests are completed.