Celine Dion “doesn’t have control of her muscles,” sister says

Read MoreCeline Dion stepped away from performing last year as she battled “stiff person” syndrome,​ a rare neurological disorder that has affected her ability to walk and sing.Celine Dion stepped away from performing last year as she battled “stiff person” syndrome,​ a rare neurological disorder that has affected her ability to walk and sing.