CĂ©line Dion Reveals Diagnosis with Rare Neurological Disease Called Stiff-Person Syndrome

Céline Dion revealed Thursday morning that she's been diagnosed with stiff-person syndrome, a rare and incurable neurological disease that can cause debilitating muscle spasms.

In a tearful video posted to her Instagram account in both English and French, the Canadian singer said her condition would force her to postpone and cancel a series of upcoming concert dates.