This is the great diva Frederica von Stade.
Here is Stade singing at the 1991 Metropolitan Opera Gala
And more opera.
Justice Ginsburg, one of the most famous opera fans in the country, is a huge fan of von Stade, listing her work as among her favorite:
Mozart, “The Marriage of Figaro”; Samuel Ramey, Lucia Popp, Thomas Allen, Kiri Te Kanawa, Frederica von Stade, Kurt Moll, Robert Tear, Georg Solti conducting the London Philharmonic and London Opera Chorus (Decca).