She kinda looks like that kid on the FB family photo.Interesting, regarding Pippa's appearance we can definitely try to collect positive and negative proof of whether it is her.
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1. She did say she lets her hair grow without ever cutting it, and that it doesn't reach as far as Shylily's, size seems appropriate
2. This girl is quite chubby, American sizes notwithstanding, I can imagine her wearing a chinese XL.
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1. We can't see her potentially missing teeth (could also be wearing her bridge or whatever it's called)