Ketty Lester (born Revoyda Frierson; August 16, 1934) is an American singer and actress known. Her 1961 hit single "Love Letters" reached the top 5 of the charts in the U.S. and the UK. She is also known for her role as Hester-Sue Terhune on the American television series Little House on the Prairie. Lester appeared in guest roles in dozens of other shows as well as films such as Blacula (1972), Uptown Saturday Night (1973), and House Party 3 (1994).