Changle Road has many fashion stores and you can get aroundto Shaanxi South Road and Maoming Road area.

Well, if you're looking for genuine clothes for young people, you can go to Grand Gateway mall in XuJiaHui. You can also go to Cloud Nine Mall at ZhongShan Park.
However, if you are looking for non-genuine copies, you can go to the Pearl Market in HongQiao area. There is also another place that sells that type of clothing but is a bit bigger. You can get there by taking Line 2 to the Shanghai Technology Museum and there you'll find a shopping place underground.