hi!
i don't know if this thread will be merged with the one Desi mentioned, but here's my 2 cents...
1.celebrities turned designers
if you can write a song, it doesn't mean you can sing it. and even if you can sing it, you may not know the right moves...etc... what kate did for topshop was not designing. but recycleing and i respect that she was open about it. she took her fav clothing pieces and made it possible for women all around the world to have a piece of kate. kate moss is not only a supermodel, but one of few true style icons and it is safe to say it since she is not a teenager (term style icon seems to get confused with she had more than 3 decent looks in past few months).
on the other hand, SJP became popular as Carrie, so it seems like people mix these two. i have nothing against SJP, but i laughed when i heard that she designed clothes and has her perfume(s). just cos you played style icon on TV screen does not mean you know anything about fashion. same goes for J. Lo, Jay Z, Kylie, Jessica Simpson, Hilton sisters... it all comes down to this: you cannot be great at everything you do, even if you are famous world wide.
2.collaborations
what is the difference between Zara and H&M? Zara does knock offs and gets money, H&M makes deals with designers and gets money. high street fashion is more like cheap version of what high fashion is all about. fashion and other arts, should start on the streets not vice versa.
so, past decade was a real disappointment - too much photoshop, too many 'supermodels', everyone is a fashion/style icon, everybody's famous, its like you got all this freedom and you wish there was some rules left cos it was fun breaking them.