How do I get this wavy look on my hair?

Use a big barrel curling iron and dont leave it in long (about 10 seconds). Start about 4 inches away from your scalp though. After you have gone around your whole head, comb your fingers through your hair to break up the curls. Put a drop or two of smoothing serum in your hands and rub together, then comb through hair from root to tip. This should do the trick. :)