The 26-year-old 'OC' star, who has her own range of handbags, does not wish to change anything in Catherine, also known as Kate Middleton before her marriage to Prince William, reported Contactmusic.
"I think she is perfect. I like her style. She always looks put together, cute and pretty. I definitely would not change her," Barton said.
Barton also said she enjoyed watching the Duchess cheer teams in the Olympics and that she is a great role model.
"I think she is a much more positive role model than most we see in ads and magazines. During the Olympics, it is given people so many more positive role models and she has been one of the existing ones we look up to who is positive and healthy and cool," she added.