Céline Dion is shedding light on her health and how seriously her stiff person syndrome has affected her ability to sing.

In her first broadcast interview since she revealed in 2022 that she has the rare neurological condition, the Canadian superstar spoke with Hoda Kotb for an upcoming primetime special about what it’s like to try to sing with it.

“It’s like somebody is strangling you,” Dion said in an excerpt of their conversation that aired on June 7 on TODAY. “It’s like somebody is pushing your larynx/pharynx this way.”

Dion then raised her voice.

“It was like talking like that, and you cannot go high or lower,” she demonstrated. “It gets into a spasm.”

Dion, 56, first shared in December 2022 that she has stiff person syndrome. The disorder not only causes stiffness in the torso and limbs, but it also can produce intense muscle spasms, according to the National Institute of Neurological Disorders and Stroke.