Who is the model on the cover of The Cinderella Cleaners book series?

Someone asked her on the Cinderella Cleaners website, and she said:

"Isn't she great? I love how completely different she looks in every photo. The real "Diana" is a professional model and actress who lives in New York City. When the Scholastic Book Fair came to her middle school last fall, her classmates were thrilled to see her on a book cover!"