Canadian performer Celine Dionne has been diagnosed with so-called Stiff Person’s Syndrome.
It is a curious name for a neurological disorder that affects her vocal cords and body movement. It can be triggered by loud noise (such as a stage orchestra). It has caused her to cancel her current concert schedule. More information is here:
https://rarediseases.info.nih.gov/diseases/5023/stiff-person-syndrome