Thérèse Tanguay Dion, affectionately known to Quebecers as "Maman Dion," has died at the age of 92.
According to Radio-Canada, Tanguay Dion died Thursday night, surrounded by her family.
A television host and philanthropist, Tanguay Dion was the mother of 14 children, two of whom had careers in music: Claudette and Céline Dion.
Tanguay Dion played an important role in launching her daughter's music career.
She wrote the song Ce n'était qu'un rêve, which was Céline Dion's first hit, in 1981, when Céline was 12.
In 2006, she started her own foundation for the education of disadvantaged children, the Maman Dion Foundation.
Céline Dion posted the news that her concert in Miami will go on as planned Friday evening.
"Maman, we love you so much," she wrote. "We dedicate tonight's show to you and I'll sing to you with all my heart. Love, Céline."
On Friday afternoon, Quebec Premier François Legault tweeted out his condolences.
"A remarkable woman, so generous, so loving, who devoted her whole life to the benefit of her family," he wrote. "Our big Québécois family mourns her passing."