Iran / Bass
Romania / Mezzo-soprano
Canada / Soprano
Poland / Mezzo-soprano
Ukraine / Bass
Armenia / Baritone
Spain / Tenor
Italy/ Soprano
Poland / Tenor
Ukraine / Soprano
Australia / Germany / Mezzo-soprano
Germany / Poland / Baritone
Georgia / Soprano
Georgia / Tenor
South Korea / Baritone
China / Mezzo-soprano
Denmark / Germany / Mezzo-soprano
New Zealand / Soprano
Poland / Soprano
Poland / Baritone
South Korea / Soprano
South Korea / Bass
Poland / Bass
Ukraine / Tenor
USA / Poland / Soprano
Czechia / Soprano
China / Baritone
France / Soprano
Germany / Soprano
Albania / Soprano
China / Tenor
South Korea / Bass-baritone
Latvia / Soprano
Italy / Baritone
Finland / Soprano
Moldova / Bass-baritone
Armenia / Soprano
Bulgaria / Baritone
United Kingdom / Tenor
Italy / Soprano
Lithuania / Soprano
Mexico / Tenor
China / Bass-baritone
China / Soprano
