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From an overworked, crying restaurant server to a beauty mogul earning $4 million in one year.Katie Fang's career exploded with an unplanned viral video showing her raw emotions. Now, this NYU undergrad has 7M+ followers and is doing brand deals with Dior, appearing on billboards for Kosas, and is the face of Cetaphil.Her strategy? "Being unapologetically yourself." Read more: https://t.co/nKiJyL9XCr #ForbesUnder30 (Photo: Sebastian Nevols for Forbes) ...