Thérèse was reportedly surrounded by her family when she died on Jan. 16.
Céline's Jan. 17 show in Miami will go on as scheduled, she announced on Twitter when writing about her mother's passing.
"Maman, we love you so much," she tweeted. "We dedicate tonight's show to you and I'll sing to you with all my heart."
François Legault, the Premier of Quebec, took to Twitter to send his condolences to the Dion family on Jan. 17.
"Sad to hear of the death of Thérèse Dion, Maman Dion to Quebeckers," he wrote in French. "A remarkable woman, very generous, very animated, who devoted her entire life to the well-being of her family. Our big Quebec family is in tears over her departure. All my condolences to the Dion family."
Triste d’apprendre le décès de Thérèse Dion, Maman Dion pour tous les Québécois. Une femme remarquable, si généreuse, si aimante, qui a consacré sa vie entière au bien-être de sa famille. Notre grande famille québécoise pleure son départ. Toutes mes condoléances à la famille Dion
— François Legault (@francoislegault) January 17, 2020
Thérèse was born in Mont-Albert, Que., on the Gaspé peninsula in 1927. She raised 14 children, including Céline. Affectionately known as Maman Dion by Quebeckers, she was known for helping launch Céline's music career by writing the song "Ce n'état qu'un rêve" ("It Was Only a Dream") with the star's brother, Jacques.
Later in her life, Thérèse became the host of a cooking show on Quebec TV channel TVA, and launched Pâtés de Maman, her own line of food products. She consistently gave so much of herself to the world, and boosted this in 2006, when she launched the Fondation Maman Dion, which helps underprivileged children with school supplies, clothing and eyewear.
Céline's father, Adhémar-Charles, passed away in 2003.