Jonathan Tetelman transformed from nightclub DJ to international opera star.

Greece has launched its main summer theater and arts festival, dedicated this year to opera great Maria Callas who was born 100 years ago.

United States' soprano Lisette Oropesa poses in front of La Scala opera theater in Milan, Italy, Saturday, Dec. 5, 2020. Soprano Lisette Oropesa was to be the first American to single a title role in the gala season opener of La Scala since Maria Callas in the 1950s. Oropesa is one of 24 singers recording for a broadcast event marking the traditional Dec. 7 opening. (AP Photo/Antonio Calanni)MILAN – Soprano Lisette Oropesa was to be the first American to sing a title role in the gala season opener at La Scala since Maria Callas in the 1950s. Management opted for a gala evening of star singers and ballet dancers, mostly recorded in segments in advance.