The 'FabLife' host, who turned to TV presenting after retiring from the catwalk in 2005, admits she has faced a lot of obstacles in the past.
Asked what doors were locked to her before she found fame, she said: "Oh, so many. There was a door that was locked because I was a young black model and the first six agencies I knocked at said no, I think four of the six said, 'We already have a black girl.'
"And then once I was successful, designers were like, 'You're getting too thick.'
"When I wanted to be a television producer, I had a lot of people tell me, 'Oh, you're a model, you could never do that. You walk runways in your underwear.'"
The 41-year-old star, who graduated from Harvard Business School in 2012, is very ambitious and decided to go back to university because she wanted to have a self-funded company.
She explained: "I'm obsessed with ownership. I want to have the say, not just a say. So I needed to have the tools. I want to be a really strong leader."
Asked what she would tell her 25-year-old self, she told the December issue of Glamour magazine: "Take some time for yourself. You're still gonna be successful if you go on that vacation."