Those two newer pictures are, indeed, cute and much more age appropriate. She can look really darling when she lays off the fake bake and wears flattering clothes. Much like Christina A. and Britney S., eh?
As regards the boobies, when I was her age, and a little chubbier, I had fairly large breasts for my age, too, and was really bad about wearing a lot of low-cut tops and push up bras. It is the whole novelty of the thing.
I swear I was totally flat-chested until I was 17, then I was like "Wow! I have boobs now...gotta take advantage of this stuff." The novelty wore off, and I swiftly got sick of guys trying to look down my shirt, and I started wearing more modest clothes again.
I bet when a lot of these junior-hoochies hit about 23-24, they'll realize that the boobs aren't going away and don't really need to be on 24-hour public display to prove their existence.