Bob Geldof's daughter Peaches may have weighed into the debate on the unhealthy image presented by the fashion world but it did not stop her appearing at a fashion show.

The 17-year-old, who last week said teenagers were surrounded by a "culture of thinness", appeared at the Ben de Lisi show for the London Fashion Week spring/summer 2007 collections.

Peaches, looking uncharacteristically understated in a sophisticated black dress, attended the show at the BFC tent outside the Natural History Museum on the arm of her boyfriend, indie rocker Fred Les.

The Boomtown Rats singer's daughter by Paula Yates has turned reporter on the topic of the fashion world and its links with celebrity culture.

She investigated the issue for a special edition of Tonight with Trevor McDonald, called Peaches Geldof's Body Issues, which is to be broadcast this Friday.

In it, she says: "As a teenager, I am surrounded by images of beautiful women, thin models on the catwalk, quick-fix diets to make us thin - the essential staples in our culture of thinness."

"Hyper thin is today's celebrity standard," the 17-year-old adds.

She continues: "The problem is that most of the images we are exposed to every day have been manipulated and no longer represent reality.

"The images of models and celebrities that kids aspire to be like often don't actually exist in reality. The body shape that young girls aspire to look like isn't real. No one could actually look like that."

To prove her point, Peaches poses for pictures which are then air-brushed with techniques routinely adopted by magazines and adverts to alter and improve images.

After the shoot and touch-up, Peaches sees the pictures and says: "Wow, is that me?"

She also interviews former Hear'Say member Myleene Klass, Dr Dee Dawson from the Rhodes Farm Clinic for young people with eating disorders and model turned designer Paige Adams Gellar during the programme.

Tonight with Trevor McDonald: Peaches Geldof's Body Issues, will be broadcast on ITV1 on Friday, September 22, at 8pm.