Wow, this is amazing! I love the emotion, and how effective the pose is. I also want to add I love the hair blowing in the wind, it adds to the beach like effect. The dress is a very good choice and goes well with the setting. One thing I do want to point out though is the shells. I love your idea, but in my opinion the placement is a little funny. Perhaps if the shells were placed in a pattern instead of randomly. Then again maybe its just me!
Very well done, this is certainly one of my favourite pieces!