Question: What Ukrainian singer is known for their deep contralto and "Mamo"?
Sentence (from "Irina Zabiyaka"): Irina Alekseevna Zabiyaka (Russian: Ирина Алексеевна Забияка ) (born 20 December 1982) is a Russian singer and lead vocalist, songwriter in the popular Russian group Chi-li (Russian: Чи-ли ).
Relevant evidence: No