(Credit: Tatyana Vlasova) Soprano Kristine Opolais has announced on her Instagram profile that she will begin a collaboration with the concert agency Berin Iglesias Art. The company was founded in 2003 in Germany. Its current roster includes such artists as Anna Netrebko, Yusif Eyvazov, Olga Peretyatko, Ekaterina Gubanova, Ekaterina Semenchuk, and Maria Kataeva, among others. Berin Iglesias Art will be {…}