FWIW I thought it was fake too. I still don’t know how they made that upper knot. Dior-tier hairstylists are amazing.
Keep in mind they have a handy bundle of matching long hair strands. So they could use a clear elastic band to hold the short hair, then wrap it with matching long hair. Given that it’s for a significant event, the model might even have had slightly longer hair, and after forming that tiny bun the stylist cut off any excess.
Yeah. It’s probably a regular ponytail tucked beneath the hair and then they just used some of her strands to wrap it tight. Especially since they did nearly the same on the cut off hair.
So, they used one of those “bump” things underneath her hair on the top of her head, which is what gives that extra dome shape and a cavity for her bottom layer of hair to get tucked in to. Then they did a ponytail with the top half of her hair, folded around the chain link, and tucked the excess tail inside. Use some of the hair starting from the bottom most side of the ponytail and wrap it around. That wrap around the base of the tail does not need to be separate from her hair. Easy to make it look like it is with some careful positioning. Plastic bands, hairspray, and potentially woven thread to really keep it all stable. The bump is what makes it all possible.
As for the cut off portion, I think it’s fake/not hers. You can kind of tell by the coloring not 100% matching her hair, but it is pretty much spot on.
