(Credit: Metropolitan Opera) The Metropolitan Opera has announced Week 15 of its streaming service, which includes performances by such superstars as Sonya Yoncheva, Kathleen Battle, Luciano Pavarotti, Roberto Alagna, and Joyce DiDonato among others. Here is a full breakdown. Monday, June 22 – Verdi’s La Traviata Starring Sonya Yoncheva, Michael Fabiano, and Thomas Hampson, conducted by Nicola Luisotti. From March 11, 2017. {…}