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But what many don't know about the 31-year-old Texas native is that she holds degrees in both law and business, and even passed the bar exam.
But instead of practicing law, Lilly started a bikini line.
Today, Lilly's multi-million dollar brand includes swimwear, beauty, fashion, fine jewelry, champagne, and How-To seminars for aspiring entrepreneurs - all of which she promotes to her over 1 million Instagram followers.
Most recently, the designer launched a new line of women's apparel earlier this month for WantMyLook.com during New York Fashion Week.
Lilly shared her behind-the-scenes photos from Fashion Week with Business Insider.