Jessica Alba's wavy bob is ultra-sophisticated and so easy to do. Steal her style: 1. Part damp hair down the middle. Apply curl enhancing cream and let it air dry to bring out your natural waves. 2. If your hair is naturally straight or you just want to touch up your waves, wrap sections of hair around a 2-inch curling and finger comb through to loosen them. 3. Put a dab of styling wax on your fingertips and piece out the ends of your tousled bob to give it more body.