I’m guessing the answer to that is “money.”
To be honest, even if you don’t like the way Amy dresses, at least she does have her own distinctive look, which is more than we can say for a lot of the starlets who have put their names on collections (cough cough Amanda Bynes). Beehive hairdos, cat-eye black liquid eyeliner, miniskirts, and sleeve tattoos may not work on everyone, but at least if you wore those there would be something recognizably ‘Amy Winehouse’ about them.
However, the fact that the photoshoot where she debuted the clothes was shot by Bryan Adams? That’s just inexcusable.