Jimmy Buffett's cause of death has been revealed. In a new update from TMZ, sources tell the celebrity news site that Buffett died from skin cancer that turned to lymphoma.

TMZ reports that Buffett was diagnosed with skin cancer four years ago, attributing the information to "sources with direct knowledge" of the matter.

"He lived his life in the sun, literally and figuratively," one friend of the singer's told TMZ.

Buffett reportedly began receiving hospice care last Monday, and Sir Paul McCartney visited him at home and sang to him and his family.

Buffett's website broke the news of his death in a message to his fans.

“Jimmy passed away peacefully on the night of September 1st surrounded by his family, friends, music and dogs,” the message reads. “He lived his life like a song till the very last breath and will be missed beyond measure by so many.”

Buffett was 76 years old.

Alan Jackson was among the many who posted tributes to Buffett to social media on Saturday (Sept. 2) after the news of his death broke. The country superstar posted a lyrical excerpt from "Boats to Build," which he and Buffett recorded together in 2004. That recording came just one year after the pair scored a massive No. 1 hit and won a CMA Award for their collaboration on "It's Five O'Clock Somewhere."

Kenny Chesney also shared a tribute to Buffett online, singing "A Pirate Looks at Forty" in a heartfelt homage.

See Inside Jimmy Buffett's Staggering $6.9 Million Palm Beach Mansion

Jimmy Buffett sure knows how to live the good life. His former 3-bedroom, 3.5-bathroom, 4,039-square-foot mansion in the exclusive Eden Properties neighborhood in Palm Beach is exactly the kind of laid-back home you'd expect the superstar to relax in when he's off the road.

The interior centers around a combined dining and living room with eye-popping vaulted ceilings topped off by skylights, while a massive wall of mahogany-framed sliding glass doors looks out over the pool area outside. The kitchen is decorated in gleaming white, and each of the bedrooms has its own attached bathroom, while the massive master suite also has sliding glass doors that open to both the pool and a bathroom that looks like it belongs in a high-end resort.

The exterior of the house is just as striking, centered around a sparkling pool of deep cobalt blue. The pool area features plenty of lounging, and a loggia just outside the living room offers open-air dining. There are lush gardens, brick paths that walk through elaborate pergolas and a fountain. The property also features a two-car garage with a guest suite overhead, and it offers deeded access to the beach nearby.

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