Tina Fey performed on SNL.
Tina Fey . She then joined SNL as a writer , later becoming head writer and a performer , known for her position as co-anchor in the Weekend Update segment . After leaving SNL in 2006 , she created the television series 30 Rock for Broadway Video , a situation comedy loosely based on her experiences at SNL . In 2008 , she starred in the comedy film Baby Mama , alongside former SNL co-star Amy Poehler . In 2008 , the Associated Press gave Fey the AP Entertainer of the Year award for her satirical portrayal of Republican vice presidential candidate Sarah Palin in a guest appearance on SNL .