Well, it's not easy to shoot these kind of images since the model has to be able to hold that pose for a bit and also when it comes to the technical part, they really want the legs to be 180° degrees straight. Now what i really like about this image is that her 'camera left' leg is just tilting from the floor which means the foot is carrying all the wait and it requires some body control to have these kind of crazy images.
In regards of the lights, two stripboxes WITHOUT the grid in the back and one white light in the front (big indirect softbox) just to give it back some natural colors.