Okay, I just called. She said it's one hour in the Bibbity Bobbity Boutique for hotel guests only to get made up as princess or knights. She said the hotel guests go there b4 any park guests are allowed to so they have the place to themselves. It is something they just started this summer & not sure how long it will last. She said you can do this same type of thing at Disney 365 & get made up like a rock star.
Another added bonus for staying onsite.