my grandma told me to read this article.

So you should, too.

"The chain says it employs no designers, “just very savvy designer merchants,” Ms. Boisset said. Although these merchants’ skills are at the heart of Forever 21’s success in offering shoppers faithful adaptations of runway hits, the company declined to make them available for an interview."
http://www.nytimes.com/2007/05/10/fashion/10FOREVER.html?pagewanted=1