But she insisted she had not misled her legions of fans, telling the magazine: "It was well known among my viewers that I had an editorial consultant and an editor long before I even began writing the book."
With more than 9.3 million subscibers to her YouTube channel and over 3.8m followers on Twitter, Zoella is among the most recognisable of internet celebrities.
When book was released last year it became the fastest selling debut novel ever.
Her Zoella beauty range at Superdrug has also broken sales records, and she has just released her second book, Girl Online On Tour.
