Instagram/Duffy singer TV Welsh singer Duffy shares her full story in a new documentary. From her "Mercy" fame to her traumatic hiatus and healing journey. A deeply personal film on D... April 2, 2026 AceShowbiz - Duffy, the Welsh singer who rose to fame with her hit "Mercy" in 2008, is set to share her full story in an upcoming documentary produced by Disney+ U.K. and Hulu Originals. Duffy first gained widespread acclaim with her debut album Rockferry, but after releasing her second album in 2010, she disappeared from the public spotlight.