Not sure what happened, but my 3-year-old daughter has become obsessed with princesses! I tried to fight it for a while, but now I've moved to the acceptance phase. I heard that the book "Cinderella Ate My Daughter" is supposed to be good on the subject, so I just got a copy:

http://www.amazon.com/Cinderella-Ate-Daughter-Dispatches-Girlie-Girl-ebook/dp/B004DI7M2Y/

Is your kid super into princesses? Are you fighting it, or embracing it - or something in between...