January 12, 2026 - An artist I discovered early last year after her debut project release, now a rising UK singer-songwriter, Sienna Spiro made her Tonight Show Starring Jimmy Fallon debut on January 8, performing her breakout single “Die On This Hill", delivering a stripped-down yet powerful rendition, leaving Jimmy speechless and bringing a standing ovation to the crowd. Sienna took the stage not only accompanied by piano and a 12-piece string ensemble. Watch HERE.