I do not have pics of the process, sorry, but here is what I observed.
1. They brush the hair out and put A LOT of gel in it.
2. They slick it back into a ponytail high on the head and use even more gel to ensure it is slicked and will stay in place.
3. They twist the pony tail into a bun and use more gel (are you seeing a pattern here - LOL) and bobby pins.
4. They use a hairpiece that consists of hair around an elastic (like a scrunchie of hair). Before putting this hairpiece on, they back come the hair on the scrunchie (just the short stuff at the top of the scrunchie - there are also long pieces that hang down too). They make the scrunchie hair really poofy.
5. They attach the hairpiece around the bun. The backcombed hair hides the bun. They long pieces just hang down naturally. They use a lot of bobby pins here too.
6. They hairspray it and pixie dust it (which is just glitter you can get at a craft store).
7. Then you can attach the crown.
Here is DD's finished result:
It is hard to tell from the photo, but none of that is her real hair, that is all the hairpiece. They just really poof up the hair on the hairpiece.