In honor of the impending finale of Mad Men, why not make a thread for the one regular (or semi-regular, in the cases of Alison Brie and Peyton List) female cast member who still doesn't have one (again, the still-underage Kiernan Shipka notwithstanding)? :D Alas, these 2 pics from a photoshoot from Christina's younger (and less voluptuous) days appear to be the only records of her bellybutton exposure. :-[