Agreed, partially.
I don't think she's a ditz. I could be wrong but my take is that she is a woman of above average intelligence who has spent FAR too long among the sewer 'Rats in Hollyweird and has become victim to the inevitable effects of that lifestyle.
However, there is also the possibility that she's 'having us on' and says these things in order to further entrench her persona into that culture.
It's not always wise to take things at face value.
As for her looks....I don't care if she looks overweight or like as thin as refugee from Biafra. She never was my type and doesn't do a thing for me.