Tina Fey says she's retiring the Palin impression

My friends, both the real and the fake Sarah Palins are going away.

As Sarah Palin packs her bags and slinks back to Alaska — prediction: when she’s free in two years she’ll get her own show on Fox News — her comedic nemesis, Tina Fey, says she’s retiring the Palin impersonation that helped give “Saturday Night Live” such a ratings boost this season.

“I have to retire just because I have to do my day job,” the creator and star of NBC’s “30 Rock tells Entertainment Weekly.

“I think [Kristen] Wiig would do a really good job.”

As for whether there’ll be an official Palin torch passing, she says, “Maybe we could get a real torch. Or I could give Wiig the Palin wig.”

“30 Rock,” by the way, is back with the second episode of its third season Thursday night. It’s the Oprah episode! Here’s a preview …