Canadian pop singer Celine Dion announced on Friday that she was canceling the European stretch of her world tour, scheduled to resume this summer, due to a medical condition that makes it difficult for her to perform.
The announcement comes four months after the 55-year-old Quebecoise singer said she was diagnosed with a rare neurological disorder called stiff-person syndrome that causes muscle spasms. At the time, the disorder forced her to postpone some European shows on her "Courage World Tour."
