Toppa Top 10: Ten Artists You Might Not Know Are Guyanese 10 9 8 7 6 5 4 3 2 1 1 February 21, 2013 5. Leona Lewis With her four-octave vocal range and soaring ballads, Leona Lewis has been called England’s answer to Whitney Houston and Mariah Carey, Leona. Her father, Joe Lewis, is Guyanese.