Great stuff, Christina. The first version was a tad dark which your last edit took care of. Careful with the highlights. And yes a bit of headroom improves the image. Rather than cloning the extra space, try making a layer copy and stretching it. Then use varying opacity eraser brushes to blend it in. That will avoid any hard transitions from lighter/darker patches. Nice job overall.
As the old monk said to Grasshoppa, "time for you to leave..." If you're too young to have watched Kung Fu on TV, someone can explain