I think she had some additional work on her lips as well, which by the way is extremely hot!
You know, normally I would agree, but weirdly in this case I don't like Nikki's new look much. I don't know why.
With her old face, I really liked the way she could look "normal" one moment and then turn on the "nasty" the next. But with the new lips (combined with the new haircut) it's like the only look she can really do now is the generic bimbo fuck-doll look. Which is hot, yes, but a lot of girls do it just fine, many of them better than Nikki.
I guess I just feel like she's abandoned the parts of her look that made her unique in order to blend in with the crowd.