From her first Scary Movie to now days her breast size is definitely bigger, so we think that she got some breast implants, not too much, just perfect size for her body frame, probably under the muscles giving her a more natural look.
In some pictures there is also a change on her lips, probably she got something not permanent done, including the possibility of enhancing gloss and make up tricks, since she usually go back to her usual lips size with time.
We think that's all, there have been also rumors about a rhinoplasty, if it is the case, it was something very subtle, because we see the same shape on her facial features than before.
