Mirella Freni (Italian: [miˈrɛlːa ˈfreːni]; born Mirella Fregni on 27 February 1935) is an Italian opera soprano whose repertoire includes Verdi, Puccini, Mozart and Tchaikovsky.^[1] Freni was married for many years to the Bulgarian bass Nicolai Ghiaurov, with whom she performed and recorded.
https://en.m.wikipedia.org/wiki/Mirella_Freni