Gugino demonstrates that round faces look gorgeous with a sexy fringe and height at the crown. Light feathery bangs give angles and interest to a flatter round face. Height at the crown creates the illusion of added length to the face, allowing the focus to go right to the eyes. An updo like this requires back-combing at the roots. To get that crown volume, the updo should be pinned fairly high up at the back.

Dunst's casual updo demonstrates just about everything you shouldn't do if your face is round. A deep side part accentuates the width of her face. The long loose front draping across her face serves to further flatten it and emphasize its roundness. Finally, the total absence of height at the crown ensures that her face looks as round as possible.

This soft graceful updo looks good on just about everyone, but it's especially well-suited for those with a square face. Updo hairstyles threaten to accentuate an angular jawline and can be unflattering. This style, with its soft sweeping lines and face-framing tendrils break up the angles of the face and obscure a sharp jaw. The feminine curl near the face draws the focus upward to Alba's eyes. Dreamy!

Square-faced women frequently have very strong jaw lines and prominent chins. With the hair pulled completely off the face like Aniston's is in this updo, the eye is immediately drawn to the most prominent feature: her chin. So, unless you want people looking at your chin all evening, this is a bad thing. Always use long pieces of hair around the face to soften the jaw and draw focus to your eyes.

If you have a heart-shaped face, your primary objective is to keep your forehead in check and not let it become the only thing people see. Panettiere's romantic updo is a great example of how to do this. A slightly off-center part de-emphasizes the face's heart silhouette, and the wavy side-swept bangs place attention on her eyes. The heart shape face is very appealing, so you don't have to go crazy trying to correct it. Just watch that forehead.