Stefanna was born in Sofia, Bulgaria, and she began studying piano at the early age of three attending the music school Ljubomir Pipkov in Sofia. As infant prodigy, she won a scholarship from the State and she was given the possibility to study at the Conservatory of Prague and from 1990 at the Conservatory “G. Verdi” of Milan under the guidance of M° Mario Delli Ponti.
At the age of eleven, she was chosen by M° Bruno Casoni to be part of Teatro alla Scala’s children choir, this activity highlighted her talent, picking her out and giving the possibility to emerge as soloist.
Soon she began studying opera singing at the Conservatory of Milan attending the class of Prof. Margaret Hayward and graduating with highest honors under the guidance of M° Vittorio Terranova. She continues perfecting her repertoire with the soprano Fiorella Pediconi.
Her career began when she won the As.Li.Co. Competition and after she had the opportunity to come out for the peculiarity of her voice and her elegant stage presence, debuting some of the the most significant roles of the repertoire such as Violetta in La traviata in Busseto, Liù in Turandot, Mimì in La bohème, Tosca.