So here are the two pictures I chose:
http://www.flickr.com/photos/yyellowbird/4640401550/sizes/l/
http://www.flickr.com/photos/benheine/4062190339/sizes/l/
After selecting the girl out, I adjusted the brightness, contrast, saturation and also add a warm color filter to the girl. So she will look more fit in the environment of the second picture. And the final one come out like this:
And here is something else for fun...
Final: