I don't even understand why her face is being scrutinized so much with all these claims (in comments and this unnecessary article on top of it), there are no good, clear pictures of her slimmed-down face out there, nothing that's remotely comparable to the high-definition and sharp pictures of her in the past (red carpet appearances and such).
How can anyone say she looks older, haggard, has had injections or whatever, when we haven't even seen her properly yet?
That aside, I think she looks great and good on her. Jeez.
It's also obvious she's been at the weightloss for a long time, because comparing her from say 2 years ago to the time of her 1st album and there's quite a difference. She used to be really really big. Her dropping the rest of her weight over the past 2 or so years isn't that unbelievable when you look at her much older pics.
And as someone else said, she's been mostly out of the public eye for quite a while now. It's not like she's constantly in the papers like some other attention seekers and the weight dropped off within weeks of mere months.