The singer paid tribute to her mother, Thérèse Tanguay Dion, as she performed for her fans in Miami on Friday night.
Her concert came just the day after she lost her mum at the age of 92.
Celine, 51, fought back tears as she took a break from belting out her hits to assure her fans that she was “doing okay”.
The star said she was grateful that her entire family had the chance to say goodbye before her mum passed away.
Celine had announced earlier that day that her mum had died in Montreal.
She told her audience in Florida: “I’m pretty sure that you heard the news about my mom passing away early this morning.
“But I’m doing okay and we’re all okay,” reports MailOnline.
Celine explained to her fans that her mother had been ill for a while, and that the family knew she didn’t have long left with them.
Thérèse’s nurse had contacted the family just two days before she died, telling them “her time was coming soon” and that they should come to see her.
Celine added: “So last night I joined my brothers and sisters in Montreal, and I spent the evening at her bedside. We told stories. We sang songs. We hugged each other and we said our goodbyes.
Thérèse, who was affectionately nicknamed Maman Dion, was the mother of 14 children.
She worked as a television presenter and was a proud philanthropist.
She regularly joined daughter Celine at her concerts, and the duo were photographed together on the red carpet many times.