Whilst the eyes are very much similar to the treatment that Lara gives in her work, you've put some sort of bend in the nose which knocks the facial bone structure way off. The lips too seem off -- you may want to revisit those areas
It's amazing. I always loved that photo of her, but I looked at both that and the original next to each other. Her right eye seems a bit off...a tad far from the nose...of course that it could just be me.
I love the picture, I don't know if you meant for this to happen, But the nose looks a little hooked. I don't know, I'm tired, so I could be just imagining this. xD But, as far as I see, it's beautiful, it looks like a picture took with a camera.