Celine Dion cancelled and postponed a series of European shows on Thursday over problems related to a "very rare neurological disorder" that is affecting her singing.
In a five-minute video posted on Instagram in French and English, a clearly emotional Dion said she had been suffering from health problems "for a long time".
"Recently I have been diagnosed with a very rare neurological disorder called 'stiff person syndrome' which affects something like one in a million people," the Canadian diva said.
It has been causing spasms that "affect every aspect of my daily life, sometimes causing difficulties when I walk and not allowing me to use my vocal chords to sing the way I'm used to," she said.