Winter.
http://en.wikipedia.org/wiki/Winter_%28video_game%29
'nuff said.

If u really need a DS fashion game (and you haven't played them yet), go with:
Style Savvy — an incredibly layered 1st party outing, with strong online multiplayer
— or --
Pop Cutie! Street Fashion Simulation — very quirky, cutely Japanese (in a good way), that my daughter must have played thru at least half a dozen times.