Vicki Lawrence

Vicki Lawrence is an American actress, comedian, and singer. She is best known for her character Mama (Thelma Harper). Lawrence also originated many other characters on CBS's The Carol Burnett Show from 1967 to 1978, the variety show's entire series run.
In 1973, Lawrence became a one-hit wonder singer in the USA only, landing on the U.S. chart with "The Night the Lights Went Out in Georgia". It reached number one on both the United States and Canada charts.
Lawrence has multiple Emmy Award nominations, winning one in 1976. She is also a multiple Golden Globe nominee, all for The Carol Burnett Show.