These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Canon Sue: Barbie's Canon Sue starts to be averted with the movies, while being played straight with the dolls, especially Teresa and Grace.
Chelsea is Barbie 2.0.
Finally acknowledged in Life in the Dreamhouse, from the characters description alone she qualifies as a Purity Sue and Mary Sue Classic.
Copy Cat Sue: On top of being unrealistically perfect, Barbie jumps into whatever latest fad there isó there was even a Trollz Barbie! (Same perfect body and face, of course, only with Troll hair.) Her movies are also often taken from existing fairy tales but with Barbie as the star.