Céline Dion has long been known as one of the most powerful and enduring voices in music. Her career has spanned decades, her performances have moved millions, and her resilience has inspired countless fans around the world. But behind the glamour of the stage lights and her reputation as a tireless performer, Dion is now facing one of the most difficult challenges of her life: a rare and debilitating illness known as stiff person syndrome. Recently, her older sister, Claudette Dion, spoke candidly about Céline’s health and shed light on the painful realities the singer is enduring. Claudette revealed that…