The 25-year-old star admits she is still getting used to her new shape and feels shocked every time she sees a picture of herself.
She said: 'My weight? People don't realise it's as shocking to me as it is to them. When they open up a magazine and they see it ... I'm still getting used to seeing me like this and the changes and the way that ... it's weird!
'Girls in Hollywood don't like you because you become competition. They have started to get much more nasty. You think, 'Usually you say hi and now you don't.' '
Kelly ' who split from fiance Luke Worrall earlier this year following rumours he had cheated on her ' is yet to start dating other men because she is too 'strong willed' for a boyfriend at present.
She added in a video interview with gossip blogger Perez Hilton: ' haven't really been dating at all. I look at all these boys in Hollywood ... I don't think I have a type. I think that I am more attracted to genuineness and confidence.
'Men don't like women who are more strong willed than them and I am. I don't expect to find somebody until I'm older because no one wants a loud mouth for a girlfriend.'