For health reasons, Céline Dion had to cancel shows again. Until she's ready to return to the stage, it's better to cancel everything, she explained.

"I'm trying very hard to regain my strength, but touring can even be difficult when you're 100 percent strong," the 55-year-old said. The disease, which mainly causes muscle cramps and stabbing pain, affects not only Dion's legs but also her vocal cords: she has problems walking and singing.