Valentina Lisitsa (born 25 March 1970) is a Ukrainian-American pianist. Lisitsa independently launched her career on social media, without initially signing with a tour promoter or record company. By 2012, Lisitsa was among the most frequently viewed pianists on YouTube. The Toronto Symphony canceled her 2015 engagements as soloist with them because of her social media postings in support of pro-Russian separatists in Ukraine.