She did lose a lot of weight. You can tell from 2004 to 2005, she did something different. Has long has she doesn't go any further, I'm fine with the way she looks.
I think she looked gorgeous before 2005, in the first picture it's the trousers that make her look what many of you think of as fat. You shouldn't wear 3/4 lengths unless you're thin or skinny plus it's a bad angle looking down at her making her look shorter and stout. The other pic is just bad lighting but she looks great - she's pretty now but the weight loss has made her face drawn out.
She has changed a lot!! I knew that but i didn't saw those pics next to each other!! She has gotten SO skinny!! And her face is changed also in a weird way :S