Sophie Dahl for YSL's Opium perfume This advert always reminds me of that joke about Batman catching sight of Wonder Woman gyrating suggestively on the ground. Then it turns out she is in fact being ravished by the Invisible Man! Even though they flipped the image so that Sophie Dahl was positioned kneeling with legs akimbo as opposed to lying flat on her back - starkers - billboards featuring the voluptuous model were banned! This saucy campaign was launched in 2000, a year after Gucci group bought YSL and the mighty Tom Ford bestrode the fashion world like a colossus. His mission, to give a nod to the famous French house's history of sexual provocation and female liberation, put the brand back on the fashion radar. Although some argued Ford's YSL 2000 collection, which featured see-through frocks, could have been put to better use being worn by Dahl, who was painted white and turned into a redhead for Steven Meisel's Opium shoot. On wearing nothing more than jewellery and strappy heels, she says, "I think the photograph is beautiful... it was seen as being anti-women, when in fact I think it is very empowering to women."