Beyonce goes all the way - but why do naturally dark women want to be blonde anyway?

Everyone's talking about Beyonce's magical transformation into a white-skinned woman (she seems to have had something unusual done to her nose, too) but isn't this what she's been working towards for some time? I've always had trouble taking Beyonce seriously. Not because she's blonde, but because she's so patently obviously not naturally blonde, yet tries to look like she was born that way. I mean Agyness Deyn of yesterday's names post fame has that whole Alistair Campbell thing going on, and we know she washes her hair in bleach every night - it's part of a constructed image. It's the obvious non-blondes who try to make it look natural that I struggle with. Step forward Katie Hill.