Where is "little ass kicker"?
My guess is that
Michonne took her--I think after rescuing Rick they separated to look for Carl, and Michonne found Judith; it's far easier to travel holding her than carrying that heavy portable crib. If it's not her, then maybe Tara found her and took her)
And Lilly did serve her purpose, just like in the comics.
I liked how almost everyone was split into different small groups with companions that they aren't used to working with (Maggie/Bob/Sasha, Daryl/Beth, Glenn with a busload of survivors, Tyreese with a bunch of gun-toting kids, LOL).