Thanks everyone for the help. Unfortunately, the only place I have to take pictures is the front lawn, and the light part is dry grass, the dark part is shade... Which is unavoidable usually. Only option is to maybe "paint" it in Photoshop to help it match better. Rather disappointing because I like the pose she is in, and the angle I got the photo. But yeah, the background does tend to ruin it Maybe someone has some mad skills with Photoshop and can help me put in a different background, or fix the one I got?
If anyone is willing to give that a shot, pm me with your email so I can send the RAW file. Also, thank you in advance!
On a side note, thank you navydoc for that edit. I could send the full pic to do it properly though if you don't mind :P Cant really use that version as a desktop bg as its way too small :P