Heartβs Ann Wilson undergoing chemotherapy for cancer, band postpones tour NBC News Top Stories By: Gina VivinettoοΌ TODAY and Diana Dasrath 2 July 2024 at 16:41 Ann Wilson, lead singer of the classic rock band Heart, is undergoing chemotherapy after being diagnosed with an unspecified form of cancer. Β© Douglas MasonNancy Wilson and Ann Wilson of Heart perform on April 28 in New Orleans.