Meanwhile, record stores around the country are reporting a surge in sales of Jackson's albums and his songs have jumped on the charts. In Britain, where he was to perform a series of concerts, starting in July, his 2003 compilation, "Number One," is expected to reach the top spot.
Jackson memorabilia is also selling fast, raking in big dollars for many sellers.
Deepak Chopra, a spiritual author, medical doctor and Jackson's friend, said he was working on a song with Jackson dedicated to conservation and earth, one of the last recordings Jackson made.
Jackson "said he wanted to do something for the environment," Chopra said. "We were talking about how to reframe our perspective of what the environment is. ... He was moved by that kind of sentiment."
"Michael Jackson, I think... represents... a film for the real-life version of The Curious Case of Benjamin Button." Born as a shriveled old man, he dies as a youth," said author Michael Eric Dyson on "This Week."
Investigators believe an addiction to painkiller drugs could be to blame for the superstar's death.
Jackson is believed to have died from cardiac arrest and law enforcement sources said the pop icon was heavily addicted to Oxycontin and received it and Demerol in daily doses.
Chopra told "Good Morning America" the famed singer "was addicted, but he had enabling doctors who perpetuated his addiction and actually started it."
ABC News has learned that Los Angeles police were told Jackson received an injection of the painkiller Demerol an hour before the 911 call was placed.
In 2007, Jackson settled a lawsuit with a Beverly Hills pharmacy that claimed Jackson owed them more than $100,000 for prescription drugs, and during a search of his Neverland estate, the district attorney said syringes and Demerol were found on the property.
For years, Jackson was treated by Dr. Arnie Klein, a dermatologist. It was in Klein's office that Jackson met Rowe.
It could take several weeks for the coroner's office to fully assess the reason for Jackson's death. Jackson passed away on Thursday after failed attempts at CPR by Murray, and then resuscitation efforts by doctors at the UCLA Medical Center.
ABC News' Jim Avila, Neal Karlinsky and The Associated Press contributed to this report.