Singer-songwriter and Broadway composer Duncan Sheik dies at 56. Multiple outlets report that his death is confirmed through a message on his Instagram account and/or statements by his family. Reports say he had been hospitalized earlier this week after becoming critically ill, though the specific illness is not consistently detailed across sources.

Sheik is best known for his 1996 pop hit “Barely Breathing,” which reached the Billboard Hot 100, and for his shift to musical theater. He composed the music for the Broadway musical “Spring Awakening,” which wins major recognition, including Tony Awards. Several outlets note the show’s role in translating teenage angst to the stage. Others add that a new Off-Broadway project, “Memoirs of Amorous Gentlemen,” was in development and was scheduled to begin previews soon.

Details on the cause of death vary by outlet. One report cites cardiac arrest, while another says organ failure. The timing of public updates also differs: some reference critical but stable condition earlier this week, with death following hospitalization. His death is reported from New York.