So Sarah Palin claims she used to "Dress up as Tina Fey for Halloween," so she's been doing it "before Tina Fey was doing it."

Excuse me, sorry, how exactly does one "dress up as Tina Fey for Halloween"? What, exactly, does that entail?
"Observe Everything. Always think for yourself. Never let other people make important decisions for you." — from Bad News by Edward St. Aubyn