Yeah I want to know how you make your hair curly like that too!
You have inspired me to make a tutorial video! I do this with a curling iron and two techniques. I do have naturally curly hair, but here is how it is done (easier to show than to type).
1. Take top half of hair and bundle into a clip.
2. Curl the bottom in 1/2 inch thick strands normally and spray with hairspray when done. Let cool.
3. Take the top and alternate between curling normally, and taking a 1/4 strand and wrapping around the OUTSIDE of the barrel and holding it there with your hand. When done, spray with hairspray and let cool. If needed, separate some of the curls and respray to get the desired shape.