The best celeb hairstyles for every length

Keys' chic, short, graduated bob won't work on round faces. But for longer face shapes, this cut can give you a major lift. Just make sure your hair hits at the cheek area, which will balance you out, as opposed to at the jaw line, which will elongate your face.

Williams has a slender, heart-shaped face, which makes her sideswept pixie look especially distinguished and fresh. To keep super-short hair like this from sticking up, apply a little mousse, then rub a dab of pomade all over hands, touching just your ends to secure them in place.

If you've got a longer or oval-shaped face like Thirlby, you might be afraid to cut your hair short — don't be. A sideswept bang that's long enough to skim your eyebrows will balance you out.

If you've got a heart-shaped face like Portia, this sleek-and-short style works well - as long as your hair is healthy. "When you have a drier, more rebellious texture, there's no weight on the hair, and this cut can get tough to manage," says Kristina Barricelli, co-owner of Gemini 14 Salon in New York City, and Creative Consultant for TouchBack Plus. So to keep some softness, use a hydrating cream on wet hair, then top it off with a serum (like argan oil) to tame all those flyaways.

With its harsh lines, this super-short style screams, "You better take me seriously." But while lots of women think a power-cut will give them confidence, most don't realize it takes a lot to rock this look — or even feel comfortable in it. In other words, don't head to the salon when you're emotional or have had a couple of glasses of wine. "Before you cut it all off, sleep on the idea for a week," advises Barricelli. "It's going to be a long journey to grow this out into something more feminine."

With a little less spray than Sharon used here and some more movement, this sideswept style is a great look for older women who wish to keep their hair shorter — but still want it to have some personality, says Barricelli. One word of warning, though: A vibrant red color like this is hard to maintain, so consider testing the waters with a dark auburn first.

If you have a tough time getting any volume in your hair, this simple pageboy that hits at the base of the cheekbone can help you embrace your flatness. (Any more of a lift would give you a bad case of helmet-head.) "Notice how the shorter bang works really well here too," says Barricelli. "It makes her eyes appear bigger."