That's a little intro-photoshop technique called "colorize". You select the background and use a slider and a check box to make it look pink rather than - I'm assuming - yellow.
Wow, that makes sense...Well, your results are quite impressive! Thank you for the information, I think I am going to try this out on some of my own photography. Keep up the great work!
why does she stands like that? is she having a cramp or something?