Step 4... again can be any number of things. But for the purposes of this example, I chose to apply skin tone to the selected area.
Using the color eye dropper (the tool that picks a color from the image), select an area of her skin from the unedited area of the picture. In this case, I chose something right below the rectangle, and near the middle.
Then I filled the selected area using 'Color' mode. This preserves the luminance (brightness and shades of gray) while adding a more appropriate hue. Make sure you use 'Color' mode when filling. If you use 'Normal' mode... you'll make this image as editable as the picture in the right column.
