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Just hours prior to his sudden death on Thursday, Prince was spotted hitting up a local Walgreens pharmacy, which was apparently his fourth visit there within the week.

The continual visits, coupled with a frail appearance, have many wondering if the legendary singer was battling something far worse than the flu, as had been reported.

TMZ obtained a grainy photo which shows a thin-looking Prince leaving Walgreens at 7 pm on Wednesday.

"Prince had frequented the Walgreens for years," the website, who was first to report the news of the death, said, "but last night, people at the store were concerned because he looked much more frail and nervous than usual."

The cause of his death isn't known yet.

There is completely unconfirmed speculation around the Internet that the singer could have been secretly suffering from AIDS.

Last week, a blind item didn't name Prince, but reported that a "VERY popular African American celebrity - who has recently been in the news - now has what is being described as AIDS."

The blind report was very detailed.

At the time, Prince has played two concerts in Atlanta and his plane was forced to make an emergency landing in Moline, Illinois, just 48 minutes from his home.

Prince was hospitalized and discharged a few hours later. There were differing reports about his health, with sources saying that things didn't look good for him, while others said things were fine.

Still, the show went on. On Saturday, the day after he was released from the hospital, Prince took the stage at a dance party near his Minnesota home. Ironically, he told the crowd, "Wait a few days before you waste any prayers."

There's a lot chatter, too, that Prince knew he was dying. TMZ claims that he started writing his memoirs a month ago.

Prince friends were even surprised at his musings, saying that he had often spoken about a memoir, but had yet to act upon it. He was believed to have about 50 pages done at the time of his death.

A makeshift shrine is already being set up by fans outside of Prince's home.