Are we on the precipice of a major Céline Dion return?! It's been a long and challenging six years for the French-Canadian superstar since her last tour, which spanned 2019 and 2020. She was set to return to the stage in 2023 and 2024 for another tour, but had to cancel EVERYTHING after battling Stiff Person Syndrome, "a rare autoimmune neurological disorder that most commonly causes muscle stiffness and painful spasms that come and go and can worsen over time," according to Johns Hopkins Medicine. Sadly, the condition can have disastrous effects on a person's voice.