Barbie is a kind of "feminine ideal" that you can strive for, but no woman can actually attain. Her ultra-feminine looks are why the doll, the movie, and now "Barbie Botox" is so popular. There are many female body types that are attractive in their own way. Everyone's body is different, and we have to make the best of the body we're given. I actually consider HelloDiDi to be the Queen of BN because of her amazingly large boobs and voluptuous feminine curves. With my small frame, it would make no sense for me to try to achieve that kind of feminine body.
In my own case, I have tried to remain extremely thin while adding just enough new fat to produce boobs, curvy hips, thighs, and butt. So my body is emulating some of the Barbie characteristics, including very smooth and slender limbs. Which I like.

This along with silky-smooth clear skin, new erogenous zones, etc.
(Below): They're getting bigger . . . I'm using Estriol now.
-Graceful Curves