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Around this time last year, Celine Dion shared that she was diagnosed with stiff-person syndrome, a rare disease that resulted in her postponing and ultimately canceling her upcoming tour. While Dion has the ultimate goal of returning to the stage, her sister Claudette Dion shared an update on Celine’s condition. Speaking with 7 Jours, she explains that the singer has little control over her body movements. As translated by E! News, Claudette explained, “She doesn’t have control over her muscles. What breaks my heart is that she’s always been disciplined. She’s always worked hard. Our mother always told her, ‘You’re going to do it well, you’re going to do it properly.’” Linda Dion,…