The veteran crooner passed away on Sunday from a suspected heart attack in Santa Monica, California, according to The Hollywood Reporter.
Gabriel was in the middle of his massive MeXXico Es Todo Tour, and had just performed at the Forum in Los Angeles on Friday.
Mexican President Enrique Pena Nieto took to Twitter to pay tribute to one of the country's most beloved stars, writing, "I regret the death of Juan Gabriel, one of the great musical icons of our country.
Gabriel, also known as the El Divo de Juarez, released more than 35 albums throughout his 40-year career.
He is survived by his four children.
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