Estimates vary, but most surveys indicate that between 25% and 40% of teenager girls of school age would consider cosmetic plastic surgery.
Gok Wan, he of TV programme "how to look good naked", has a petition running to get body confidence included in the school PSHE curriculum. All he's asking is one hour per year. How much of a difference this will make may be open to question, but it can't do any harm and, linked as it is to a popular TV programme, could at least be another credible voice in the general social muttering about media, body image and the impact all this has on teenage girls.
The programme web page has a bit more info, links and a comments section which is illuminating in itself and could be useful source material for discussion on the subject with young people.