Instagram/Noah Kahan & Hayley Willi Music Noah Kahan joined Hayley Williams onstage in Nashville for a powerful duet of "Downfall," praising her as a legend during her Ryman Auditorium show. April 29, 2026 AceShowbiz - Noah Kahan recently joined Hayley Williams onstage during her Nashville concert to perform the emotionally charged song "Downfall." The performance took place on the second night of Williams' three-night run at the renowned Ryman Auditorium, marking a special moment on her first solo tour.