Finnish soprano Riikka Hakola died yesterday of a brain tumor at the age of 61, according to Opera Magazine. A graduate of the Sibelius Academy in Helsinki, she went on to study in London, Berlin, New York and Milan. Riikka Hakola was one of the leading sopranos at the Finnish National Opera for twenty years, after making her debut in Lucia di Lammermoor. She has performed on numerous stages worldwide.