I can see why this one would remind you of Mona Lisa! Nice pose, I like a little movement in the hair. I might be tempted to crop in much closer to crop out that white out sky in the right corner...but I'm a cropaholic, so you might want to take that opinion and trash it.
Although the corner is a bit hot, I am drawn to her eyes in almost every shot. You think you could get her to look serious in some shots. She has nice feature. You have a good subject, Good work and thumbs up to Ashley.
The bright spot in the sky in the right corner is kind of distracting since it's really bright white...I do like the textures and all that tho...My eye just keeps going to the bright corner instead of her face. :(