The only thing that I don’t think represents her is the face. The outfit, hair, even to a degree the exaggeration of size. But the face isn’t even a caricature of her in any shape or form imo. If I saw just the face close up like someone did earlier, i wouldn’t guess it was Serena. Put it all together though and i know it is her they are referencing.
I think Mark Knight could have done a better job and still made his point about the dummy spitting.