She’s made Americans laugh till it hurts with her Sarah Palin impressions on Saturday Night Live, and has picked up so much steam that she’s setting out to author her very own book. But how does Tina Fey really feel about the lady that’s given her so much comedic fodder, Sarah Palin? “We’re gonna take it week by week. If she wins, I’m done. I can’t do that for four years. And by ‘I’m done,’ I mean I’m leaving Earth,” she said to TVGuide in the magazine’s October issue. But then she had some nicer things to say: “And that lady is a media star. She is a fascinating person, she’s very likeable. She’s fun to play, and the two bits with Amy [Poehler], that was super fun,” But, who would take your place, miss Fey? Oh, yeah. Maybe Palin herself.