Gunhild Margareta Hallin Ekerot (20 February 1931 – 9 February 2020) was a Swedish opera singer, composer and actress. Early life and debut. Hallin was born on 20 February 1931, in Karlskoga. She made her debut during her time as a student at the University College of Opera in 1955 as Rosina in Rossini's The Barber of Seville. Career. https://en.wikipedia.org/wiki/Margareta_Hallin