Upton, 22, said she always wanted to have a fuller figure, liek the one she has now, reported E! Online.
"When I first started modelling, I was a normal catalogue model. Then, I became a woman, and I was really excited about becoming a woman. Because I'm from Florida, it's all about being in bathing suits.
It's a different view of beauty there. You are ugly if you don't have a curvy body. And I didn't have one, and then I got one, and thought, 'Yessss!'" she said, adding that she feels good when people tell her she has grown healthier.