Jimmy Buffett died of uncommon skin cancer.

– Singer Jimmy Buffett, known for hits like "Margaritaville," passed away at 76.

He battled Merkel cell skin cancer for four years before his death.

Buffett continued to perform during his cancer treatment.

Merkel cell carcinoma is a rare and aggressive skin cancer.

About 3,000 new cases of Merkel cell carcinoma are diagnosed in the U.S. annually.

Long-term sun exposure and weakened immune systems increase the risk.

Buffett postponed a concert in May due to health issues.

In lieu of flowers, donations can be made to Singing for Change and cancer research institutes.

Buffett was a singer, author, and business owner with brands like Margaritaville.

Born on Christmas Day in 1946 in Pascagoula, Mississippi.

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