Korean Immigrants, Do Won Chang and Jin Sook, moved to America from Korea in 1981. Do Wan worked simultaneously as a janitor, a gas station attendant, and at a coffee shop when the couple first emigrated. Three years later, they opened their own clothing store which has since blossomed into the internationally-famous brand Forever 21, with hundreds of stores and billions of dollars in annual sales. The enterprise remains a family business with their daughters working for the company. "Forever 21 gives hope to people who come here with almost nothing," Don told the LA Times. "And that is a reward that humbles me: The fact that immigrants coming to America, much like I did, can come into a Forever 21 and know that all of this was started by a simple Korean immigrant with a dream." Today, the couple is worth $3.9 billion, according to Forbes. (Source: Business Insider, Forbes articles)