Do not, repeat not, go and see Zoolander 2 if you're seeking a piercing satire on the fashion world. True, there are some blink-and-you-miss-them (literally, in Kate Moss's case) cameos from some of fashion's key names: Marc Jacobs (or Marc by Marc Jacobs) as he's called in the film, Tommy Hilfiger, Alexander Wang, Karlie Kloss, Anna Wintour (excellent as a wicked witch) and Valentino, his famous orange-y tan so extreme Pantone may have to invent a new name for it.Zoolander 2 offers much fun to be had for those plugged into the zeitgeist and especially for fashion obsessives, who'll enjoy spotting the in-references.There are jokes about the fashion world's latest buzzword - non-binary - thanks to a none-too subtle performance from Benedict Cumberbatch as a Givenchy-style, hermaphrodite model.There are also gags about fashion's distaste for fat people, its obsession with reinventing tired old ideas, its desperate vampiric suck on youth and its love of the slash.At the opening Derek is a tragic figure: model/former-model/wife-murderer. The film even has its own slash: Zoolander/Twoolander.But those preoccupations aren't really confined to the fashion world. What's interesting about the interval between the release of Zoolander (in 2001) and the sequel is that it has witnessed a genuine change in human behaviour where narcissism - a semi-furtive activity that narcissists used to share only with their mirror - has become a celebrated career path.In that sense Stiller was right not to confine his film to a narrow fashion cabal. In any case, how do you satirise an industry in which John Galliano can demonstrate remorse for his racist sentiments by dressing up as a Hassidic Jew and get away with it?How do you mock a business which bandies the word philanthropist around as freely as it does the word discount? Where diva behaviour is indulged, encouraged and fetishised? Besides which, it's been done before.Stiller is too smart not to know this. Did he also realise that by having so many industry bigwigs queuing up to be in his film (and letting them in), he was effectively declawing it?Maybe it's significant that the one contemporary meme Twoolander doesn't explore is "meta". This film, with all its support from a business it's allegedly spoofing, takes meta to a new level.'Zoolander 2' opens in cinemas tomorrow..