Just another MLP drawing. Princess Luna is the best princess, hooves down x3

This is my third attempt at drawing her. My first two attempts.... well... not so well:

First Attempt: http://wyldfire7.deviantart.com/art/Princess-Luna-358844884?q=gallery%3Awyldfire7%2F28938839&qo=5

Second Attempt: http://that-darn-dragon.deviantart.com/art/Luna-Eclipse-360598310?q=gallery%3Athat-darn-dragon%2F40593055&qo=5