She looks really good. I again, love the hair, I love the flow from light to dark.
Now, Im sure you want some criticism from other's eyes. First, your eyes, even though the outline is alittle thick, are very good, get that fixed and you will be fine. The ears looks quite good although I would show more of a difference between the furry and the skin parts, eh' (If you have cats you know what I mean. no fur in their ears besides thin white fur)
Her skin is really to light, unless she lived in the house without going outside for a year then went to the beach, try using a darker tone, even, if I may dare say, give her a tan, she is in a bikini after all eh'?
I know your scared, but I really think it would make ALL the difference in the world if you darkened up the sunken lines on her thighs, belly button, stomach, and the bikini lines.