Former NIGHTWISH singer Tarja Turunen will perform as a guest soprano at the Savonlinna Opera Festival in Savonlinna, Finland. She will appear on July 17 with world-famous Argentinean tenor José Cura and the Kuopio Symphony Orchestra. More than 300 artists from 12 countries will perform during the 2011 edition of the Savonlinna Opera Festival, which will take place between July 1 and July 27. For more details and ticket information, go to this location. Tarja's sophomore solo album...