You know, I was about to bite on the topic, but I think the "glam" clothing and the mention of boob jobs might be obscuring the larger issue.
Children (and adults for that matter) tend to pay attention to the ideas presented to them. If they see their parents and peers dress a certain way, they tend to dress in that way. If they hear their parents or peers talk about a certain topic (whether it's advocacy or contempt), they will pay attention to that topic (and may either accept, reject, or qualify that viewpoint). Since people tend to not do things they have not paid any or much attention to, the simple acknowledgement that the issue exists (including through the censorship of said issue) risks encouraging the person doing the said thing.
The interests these particular girls is fairly consistent with this idea. The women (adults, including their mothers) and girls (peers) in their lives tend to have focus on glamorous clothing, boob jobs (partly attributible to wealth), and body weight, and so it shouldn't be a surprise that these children think in this way. However, if you look at girls in general, there is growing tendency for them to desire "sexy" clothes and obsess about their body weight, but you can see that parents and other adults act in kind.
Once you strip the "celebrity" out of the story, the people are dealing with a fairly mainstream issue. Many women of all ranks commit these same sins (and many men reinforce them), and they have a tendency to dress up young daughters in ways that are still "girly" (even if not necessarily "sexy girly"). If adults want to see a change in behavior, they can do a bit of good by evaluating how they conduct themselves and how they interact with their children.
