Crystal Renn says being a plus-sized model was too pressurized.

The 25-year-old beauty has seen her weight fluctuate over the years, and despite being very successful when she was at her heaviest, she admits the pressure became too much.

"I think that by placing a title on my head, which is 'plus-size,' and then the picture that these people have created in their mind about what plus-size actually is, I've basically failed you just with that. Because I couldn't possibly live up to that, and at this point in my life I would have to actually have another eating disorder to live up to that expectation," said Crystal, who is a US size six.

As well as her weight changing, Crystal recently dyed her hair platinum blonde and said she was "excited" by her transformation: "People can't believe the transformation. I had black hair and now I have white hair. That's what's so exciting. I wanted to do something different. I wanted to show up as a different canvas at a shoot. It's a very extreme look but very beautiful. Though it's nothing conventional."