She's been editing her eyes in her latest pictures. The white part of the eyes is looking altered, it's "too white" to be natural. I'm guessing she's using one of those apps that add makeup to your pictures.She actually has the eyes and bone structure so she feels much realer and prettier - lots of dark eyed or heavier girls wear light contacts and over-contour to look like they have cheekbones and not just fat.
I'm not sure if she edits her eyes actually, or if they just look green in some lights and blue in others.