I have no kids so this is just the info I have seen on the boards
PFF is an area that includes a Princess Meet and Greet, a seperate story time area, and a craft area that are all free. There is also a "boutique" over there that you can pay to have a girls hair and nails done, and buy princess dresses. They have quite a few options, but some say a little simple and young.
Some people prefered the makeover at Libby Lu more, which is on DTD. They have princess, Miley Cirus and other styles which include an accessory and some other goodies. But you do need to look at reservations since they book up early.