The documentary "I Am: Celine Dion," directed by Irene Taylor, has achieved the status of Prime Video's most popular documentary ever. Since its release on June 25, the film has captivated audiences worldwide, chronicling Dion's extraordinary career and her recent battle with stiff person syndrome. This rare neurological disorder, which has plagued her for 17 years, has at times rendered her unable to sing, adding a poignant layer to her story.