Celine Dion overcomes rare neurological disorder to perform first concert in 6 years
Celine Dion's return to the stage underscored a remarkable comeback after stiff-person syndrome, an incurable condition that causes stiffness and cramps, forced her to cancel shows and cast years of uncertainty over whether she would ever perform again.

<p>Celine Dion's return to the stage underscored a remarkable comeback after stiff-person syndrome, an incurable condition that causes stiffness and cramps, forced her to cancel shows and cast years of uncertainty over whether she would ever perform again.</p>