I agree with dajrekshn and DiamondSea, it rubs me the wrong way too. I think she really wants to win this time, I think she was much more carefree about it the first two times (she probably knew at the time she didn't have a chance to win), but she probably feels her chances are very solid now thus all this promotion, which to me is kind of a sell-out. I don't know, but it's so opposed to how she always seemed in relation to the media.
Regarding the last outfit, I don't know why but somehow I don't like it, I think it's the creamish shoes and black tights.
P.S. And about this forgetting the nominations, unlike her breakfast story, I picture her sitting in front of a laptop/TV nervous like hell and anxiously waiting to hear her name.