CNN —Celine Dion is postponing several Europe tour dates after the recent diagnosis of a rare neurological disorder that doesn’t allow her “to sing the way I’m used to,” she announced. The superstar singer has stiff-person syndrome, which affects “something like one in a million people,” Dion, 54, said in an emotional video post Thursday to her verified Instagram account. “While we’re still learning about this rare condition, we now know this is what’s been causing all of the spasms that I’ve been having,” she said. “Symptoms may include extreme muscle stiffness, rigidity and painful spasms in the trunk and limbs, severely impairing mobility,” the institute says. Dion has struggled with her health for a while, she said, adding she has a great team of medical professionals and her children’s support.

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