First off, Welcome and congrats on the new baby!
Have you just talked to her about it? If she's going to get a new room, I say it's time for a fresh start! Talk to her about being a big-girl and really get her excited. Explain to her how a new room means some changes-some big-girl changes! My DD, Mara would do anything if I told her "big-girls do this" (and luckily