Oksana Petrovna Grigorieva (Russian: Оксана Григорьева; born 23 February 1970) is a Russian singer-songwriter and pianist. She studied music in Moscow and completed conservatoire studies in Kazan, before moving to London. After studying music at the Royal Academy of Music, she moved to the United States, with periods spent living in New York City and Los Angeles, California. She taught music in the U.S., and patented a technique of teaching musical notation to children.