When editing a cover for a client (or yourself), don't toss the entire cover for minor changes such as hair color, eye color or background details.
As you can see from these two photos---I made the hair blond instead of dark. I made her eyes blue. I also replaced the 1 large swan with 3 smaller swans
The hair, I found a picture with hair that suited the position of the girl. I cloned it over her dark hair. Sometimes with light hair, you can paint the hair darker rather than cloning the hair Make you match the hair line of the scalp. If you don't you could end up with skin tone issues if you have to paste over skin.
Eyes...you can blow up the picture and color the irises. Or if they eyes light, you can recolor them The cloning of color is brighter and more natural---but more time consuming.
The swans are easy---just make sure you have a similiar color in the background...or a white background you can fade out.
The majority of these changes can be done in www.ipiccy.com if you don't have PhotoShop.