Prince's sister is not "business savvy" enough to handle the rights to her brother's vast music catalogue, his former manager has said, amid reports she could be set to inherit his multi-million pound fortune.
Reformed drug addict Tyka Nelson could be in line to acquire the superstar's estate, including his vault of unreleased material, if he failed to leave behind a will following his sudden death on Thursday, according to reports.
Owen Husney, Prince's first manager, said he had "prayed" the star's legacy had been left "in good hands".
He told the Press Association: "I'm sure Tyka is a great person. I would be remiss to think she has the music business savvy to be able to handle a body of work that's got to be worth 250 to 500 million dollars.
"Prince's music has never really appeared in commercials. God forbid someone gets hold of this thing and it winds up in some toothpaste commercial.
"I pray that he has left it in good hands with people who know what they're doing."
Ms Nelson, 55, discussed her past drug problems with the National Enquirer in 2003 when she revealed she had sold her body for "food, money and Pampers."
Her brother Prince was found collapsed in a lift by staff members at his Paisley Park estate near Minneapolis on Thursday morning, more than 12 hours after he last seen alive. The 57-year-old was pronounced dead at the scene.
Police are investigating whether foul play was involved in the singer's death after police said they had "no reason to believe" he killed himself and there were "no obvious signs of trauma" on his body.
Celebrity news website TMZ reported that Prince had overdosed on a painkiller called Percocet six days before his death, forcing his private jet to make an emergency landing in Atlanta, Georgia.
Meanwhile, a drug dealer known only as Doctor D told the Daily Mail that Prince regularly bought prescription drugs from him between 1984 and 2008 and claimed the star would spend up to 40,000 dollars a time on six-month supplies.
Mr Husney said he unaware whether Prince had been taking prescription drugs before his death but voiced concerns that users can accidentally overdose when they have not eaten.
He said: "Doctors are prescribing these things a mile-a-minute. People become addicted and they can OD....if, by mistake, you take these drugs that you've been taking everyday on an empty stomach, let's say. It becomes accidental.
"I know the pressure of the business. I know for someone like Prince who was moving a million miles an hour, it could have been anything. It does not have to be drugs.
"He pushed himself beyond anyone I've ever known. He couldn't stop. Just the way's he's built."
A post-mortem examination was carried out on Prince's body on Friday but a cause of death may not be released for several weeks.
Screenings of Prince's Oscar-winning film Purple Rain are taking place across US cities later, including a showing at Target Field Station in Minneapolis.