Celine Dion's husband and manager Rene Angelil has died at the age of 73 at his suburban Las Vegas home.
A post on Dion's Facebook page confirmed the news.
"It is with deep sadness that we announce that Rene Angelil, aged 73, died this morning at her residence in Las Vegas after a long and courageous fight against cancer," the post said.
"The family wishes to live the mourning in privacy."
Angelil died of natural causes and under the care of a doctor, Clark County Coroner John Fudenberg said.
Mr Fudenberg said no further investigation into the death is expected.
Dion and Angelil had three children together - Rene-Charles, who was born in 2001 and twins Nelson and Eddy, who were born in 2010.
He also has a son and daughter from two previous marriages.
The couple, who were 26 years apart in age, got married in an elaborate ceremony in 1994 at Notre Dame Basilica in Montreal.
She resumed her residency at The Colosseum at Caesars Palace in August after taking a year off to care for her husband.
Angelil stepped down as his wife's manager in 2014, turning her career over to a friend of the couple.
However, he remained involved in business decisions.
Angelil was born in Montreal to a Canadian mother and a Syrian father.
He was a part of the group Les Baronnets until 1972, when he decided to manage the careers of several singers in Quebec.
Dion's mother sent him a tape in the post and encouraged him to listen to her daughter, who was then 12 years old.
Angelil took on her career and launched her first English-language album in 1990.
Dion has won a number of Grammy awards during her successful career, including for the Titanic theme My Heart Will Go On.