Soprano Lise Davidsen, 28, from Norway came first in the female category of the contest, held in London for the first time.
Davidsen recently graduated from the Royal Danish Opera Academy in Copenhagen and is due to make her debut at the Bavarian State Opera in Munich as Ortlinde in "Die Walkure".
Norway's Lise Davidsen performs Ruhe meine Seele by Richard Strauss
Plácido Domingo's Operalia, the world opera competition, was founded in 1993 by Plácido Domingo to discover and help launch the careers of the most promising young opera singers of today.
His goal is to attract singers of all voice tessituras and from every country in the world ranging from 18 to 32 years of age, to have them audition and be heard by a panel of distinguished international opera personalities, in the most prestigious and competitive showcase in the world.