Found the split end in about ten seconds
It looks really great the way it is, but you could fix a few more flyaway hairs 45 degrees down and right of her ring finger. Her lips could use some smoothing/wrinkle reduction, and you could dodge and burn them to give more depth. I'm not sure, but could the irises of her eyes be sharpened a little to reveal more detail? If you want to spend a ton of time, you could also do some painstaking dodge and burning to de-emphasize the bumps on her skin, particularly under the left eye.
Also, I don't get what's going on with one fingernail bedazzled and the rest plain, but I'm pretty sure that's my own problem
Of course I'm not a pro by any means, so some of those suggestions may be awful
It's still a beautiful shot without changing anything more!