First Ave., on Thursday night. Lawrence first morphed into Thelma Harper aka Mama as part of the iconic “Carol Burnett Show.” She went on to star in her own sitcom, “Mama’s Family.” ...

In the seventh season, and hundreds of hilarious sketches later, at the ripe, old age of 24, Vicki created her most endearing character to date, Thelma Harper, or “Mama” as she is better known ...