The asymmetrical bob worn by Naomi Watts adds volume and dimension to thin hair. She's also adding movement with the modest wave she's rocking on the longer side.

Whether worn up, down, or half-up, half-down, curtain bangs, like Nicole Richie's, provide thin hair face-framing volume and movement. The nice thing about having lengthier bangs

The brushed-back haircut that Jennifer Lopez maintains gives her appearance a great deal of volume. If you want to add more complexity to it, you can even tease it a little bit.

For women with fine hair, a short haircut is recommended, according to several hairdressers. Push your pixie cut back and to the side to create the illusion of fullness and volume

If you prefer to wear your hair straight, you could opt for a sleek, chin-length bob like Kelly Rowland's to keep it looking fresh. Part it in the middle or to the side for added volume.

Follow the example set by Diane Keaton! Adding a few soft layers to your bob gives the appearance of length and volume without requiring you to cut out all of the surplus hair.