The 21-year-old said she didn't want to be thought of as 'sexy' in an interview two years ago and she admitted that it's just not the right image for her.
She said to Britain's Stella magazine: 'It's just a life decision. I like wearing pretty dresses and I like trying out new styles but I don't feel comfortable taking my clothes off.
'I wouldn't wear tiny amounts of clothing in my real life so I don't think it's necessary to wear that stuff in photo-shoots.'
Asked if people still try and talk her into it, she said: 'Not anymore, no.'