News Celine Dion says she has stiff person syndrome, cancels and reschedules 2023 tour dates December 8, 2022Elise Brisco, USA TODAYComments Off on Celine Dion says she has stiff person syndrome, cancels and reschedules 2023 tour dates In a tearful video, Celine Dion said she's been diagnosed with stiff person syndrome which is what has caused her previous muscle spasms.