Legendary singer and music icon Celine Dion sat down with Hoda Kotb for an NBC News Exclusive interview to discuss her life and health since being diagnosed with Stiff Person Syndrome, a rare autoimmune neurological disorder. Dion began quietly experiencing mysterious symptoms affecting her body and her voice, and after more than a decade of testing and treatment, was diagnosed with SPS. Fearful she may never return to the stage, or to her beloved fans, Dion has spent the last several years uncharacteristically out of the spotlight, fighting for her life and her voice. Dion opens up about her health struggles, the impact SPS has had on her life and where she’s finding hope.