So sad. 😢 Celine Dion, 55, has lost the ability to control her muscles as she continues to battle stiff-person syndrome, a rare neurological disorder, her sister, Claudette Dion, shared. What exactly does stiff-person syndrome entail? Click the link in our bio for an explanation and a full update on Ms. Dion's health. ⬆️ #celinedion #healthupdate #linkinbio #stiffpersonsyndrome #linkinbio