1) she didn't actually release a lingerie line, as corrected on the first page.
2) she is nine years old, and dressing in sexually explicit ways.
3) we could debate the utopian social stratification until the sun goes down, but the fact of the matter is that we live in a world were others ARE judged by what they do.
4) all but (one?) of the jonas brothers are of legal age, and robert pattinson is too. they are not nine year old boys, and this is a nine year old girl (refer to point 2)
5) when did the jonas brothers release a line of lingerie? they are very much anti premartial sex, so this would be a strange business move for someone with their religious feelings.
6) robert pattinson has not released a lingerie line.
7) the jonas brothers and robert pattinson have an older fanbase than noah cyrus, even if they did release a lingerie line (which they didn't. refer to 5, 6) they would be aiming it at grown women, not prepubescent children.