reportedly cautioned longtime friend and former Zappos CEO Tony Hsieh about his lifestyle shortly before his untimely death.

According to an article published by Forbes on Friday, the 46-year-old singer wrote a letter to Hsieh that warned him about "taking too many drugs" after she had performed for him in August at a private acoustic set in Park City, Utah.

The publication reported that Hsieh was planning to show the songstress around the mountain town in the days following her performance, but she left abruptly Park City. The singer then sent the businessman a letter through FedEx shortly after her departure as he no longer could get emails as he had decided to do a digital purge, Forbes reports.

"I am going to be blunt, " she wrote in the letter, obtained by Forbes. "I need to tell you that I don’t think you are well and in your right mind. I think you are taking too many drugs that cause you to disassociate. "

Jewel reportedly told Hsieh in the note that "people you are surrounding yourself with are either ignorant or willing to be complicit in you killing yourself. "When you look around and realize that every single person around you is on your payroll, then you are in trouble, " Jewel wrote, according to Forbes. “You are in trouble, Tony. ”

A representative for Jewel did not immediately respond to PEOPLE's request for comment.

Hsieh died on Nov. 27 at the age of 46 after sustaining injuries in a Nov. 18 Connecticut house fire, PEOPLE previously reported. A statement provided to PEOPLE from DTP Companies, which Hsieh founded, said he died surrounded by family.

"Tony’s kindness and generosity touched the lives of everyone around him, and forever brightened the world, " the statement read. "Delivering happiness was always his mantra, so instead of mourning his transition, we ask you to join us in celebrating his life. ".








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