Hi,
We done the Princess make over for my daughter in 2016. It was really a brilliant experience and the photos we got were so lovely. You can email them in advance to book it and find out if its on when you are there - here is the address I used. dlp.dlh.boutique@disney.com
This is the email they sent me back: (this was the 2016 prices)
55€ make-up and hairstyle
120€ make-up, hairstyle and choice of a regular dress
180€ make-up, hairstyle and one of the two prestige dress (Elsa or Cinderella)
350€ make-up, hairstyle and the Belle premium dress
Each package includes an A5 size picture
It was based in the Disneyland Hotel, and you could go into the shop there and pick the dress and try it on in a changing room before deciding.
Hope this helps!