Tina Fey has built a career on comedy writing. She began writing for “Saturday Night Live”, while also performing on the show. Her imitation of Sarah Palin was one of the biggest hits the show has had in the last decade. Fey also created “30 Rock”, which is still going strong. She wrote the screenplay for Mean Girls, which became a huge hit (grossing more than 5 times its budget). Tina Fey is one of those rare people who are just naturally and constantly funny. Even when signing autographs.