Céline Dion returns to stage amid rare disease that causes severe muscle stiffness and painful spasms. Here's how she is fighting back

Céline Dion is currently touring France four years after she was diagonsed with with stiff person syndrome (SPS) - a rare condition affects only about one to two people per million. The singer kicked off her series of concerts in Nanterre, near Paris on September 12, almost after a gap of six year. The concerts at an arena in the Paris suburb of Nanterre, unveiled on her 58th birthday in March.

Her return to the stage, however, was not easy. The singer reportedly trained five days a week with a combination of Pilates and ballet as she prepares for a five-week residency in Paris later this month.