Following the postponement of her tour, Celine Dion reserved a day to mark her appearance at an ice hockey game, where she also sang again.

Dion surprised the crowd of the Vegas Golden Knights and the Montreal Canadians in Las Vegas, Nev., as the NHL game became her first public outing amid her health battle. She had not attended any events since postponing the dates of her tour after being diagnosed with stiff-person syndrome.

Celine Dion Sings Again

During her same outing at the T-Mobile Arena, Dion reportedly sang a few notes that delighted everyone.

In his interview with People, vice president of hockey communications for the Canadiens Chantal Machabée said the "My Heart Will Go On" hitmaker talked and laughed throughout the game - calling it an "incredible moment" with an amazing woman.

"She's been through a lot, and to see her like this and smiling and being so happy...it's amazing," the vice president continued. "I know she has good days and not so good days, but this was a very good day, and it was reassuring."

Dion also dropped by the venue's locker room alongside her children: René-Charles, Eddy, and Nelson.

"My boys and I had such a fun time visiting with the Montreal Canadiens after their hockey game with Vegas Golden Knights in Las Vegas Monday night," she captioned a post on her Instagram page.

READ ALSO: Celine Dion Now Using a Wheelchair? Sister Dismisses Reports Amid Concerning Videos of Other Sufferers

Celine Dion Is Fighting Her Health Diagnosis

Dion's appearance came months after sources revealed that she was determined to beat the stiff-person syndrome with "everything she's got."

"It broke Celine's heart to have to say goodbye to her fans," an insider told InTouch Weekly (via OK! Magazine). "But she intends to fight this with everything she's got. She's so brave."

Despite the constant updates from the singer's family and team, fans remained anxious after rumors claimed she was using a wheelchair already due to the effects of the disease. Videos of other sufferers also showed what would happen to Dion if her case worsens.

Meanwhile, her sister Claudette clarified in her interview with showbizz.net that Dion was morally and mentally strong and not depressed amid her debilitating health condition.

"She really has the joy of living. We will get through this," she continued. "Why do they say she is in a wheelchair? Why do they say she had cancer? Why are you inventing?"

READ MORE: Celine Dion Determined To Fight 'Tough' Stiff-Person Syndrome Amid Worrying Health Status

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