Beauty Fail, Beauty Score: The Best and Worst Celeb Trends

Michelle Williams's Perfect Pixie: SCORE

Pulling off this season's coveted pixie trend with the greatest of ease is Michelle Williams. Her hair is super-short, super-chic, and perfect for her face shape. "The reason the pixie cut looks so good is because of how it frames your face," Howse says. "You can vary the length of the fringe to make it fit your face shape perfectly."

Check out more of Howse's tips for getting a pixie cut to ace this hot trend.

Watch the neckline. The general rule is that the hair at your neckline needs to be long enough so it doesn't look like a boy's cut, Howse says. The edges should be softer, as opposed to round or square. Also, match the length with your neck. A shorter neck means you can pull off shorter fringe.

Give the sides length. Make sure your stylist doesn't give you a barbered edge on the sides or cut them neatly around your ears. Instead, give your sides some length and fringe that will hang slightly over the ear.

Keep the front fairly short. The key to the pixie is short front fringe swept over to the side. Give yourself a distinct side part like Williams for a modern take on this trend.

Keep in mind your face shape. How you cut your fringe should depend on your face shape. The more hair in the back you have, the more it will elongate your look, while shorter fringe tends to make the face look rounder. Really short fringe is optimal for oval face shapes, as Howse says it will allow your bone structure to take over. If you have a rounder face, give yourself more height on top by gently teasing at your crown.

To style this look, Howse says the more natural the better. Shampoo every day unless you have super-thick hair. “This is one style that looks better when dried naturally. Use a pomade or styling wax (something softer than gel or mousse) — apply to wet hair, then top off with finishing crème when dry. At night, use a little hair spray for slight volume to take it from casual to an evening look.”

Lately, we've been seeing celebrities shy away from a pin-straight hairstyle in favor of one with lots of volume for their red-carpet events — a swept-back look, with a softly teased crown. See which celeb pulled it off and which one missed the mark. Plus, expert tips so you don’t make the same mistake when trying this style.

Heidi Klum's Wet, Slicked-Back Look: FAIL

It takes a lot to make Heidi Klum look bad, but this hairstyle isn't doing much for the supermodel. "Heidi has the 'just got out of the shower' look," says Riccardo Maggiore, celebrity stylist and owner of the Riccardo Maggiore Salon in New York City. "It's very wet and crunchy. This type of look is only good at the beach."

To avoid looking like you ran out of time to blow-dry your hair, Maggiore suggests using a small amount of texturizer or hair balm on dry hair to add definition. Continue by smoothing and styling the hair straight back with a comb. Add more texture to the front section only and comb again, stopping in the middle of the head. Allow the rest of your hair to flow straight down, which will create a slicked-back look on top. Maggiore also suggests using a bobby pin behind the ear to secure if needed.

NEXT: See which celeb used these tips to rock the swept-back look.

Kim Kardashian's Chic Slicked Crown: SCORE

Kim Kardashian's perfectly slicked crown makes this hairstyle look chic and sexy without the crunchiness caused by product overload. "Kim's version of this hairstyle is much more elegant and modern, perfect for a night on the town or the red carpet," says Maggiore. "It's securely slicked away from her face but still looks soft and touchable."

Get a look similar to this by using Sebastian Professional Microweb Fiber, an elastic texturizing hair product inspired by the properties of spider silk to create a soft texture that’s touchable. Another do? "Keep it simple," Maggiore says. "You want your hair to be soft and sleek. If you overuse product, your hair will look heavy and wet."

Red lips in Hollywood are a dime a dozen. Every celeb has sported a pair down the red carpet at least once, and with awards season gearing up again, we're sure to be seeing red for the next few months. Find out which celeb rocked the red lip the right way and which one could use a little help. Lucky for them (and you!), celebrity makeup artist and founder of LORAC Cosmetics Carol Shaw has some tips for perfecting your red lips.

Kat Von D's Clashing Lips (and Locks): FAIL

"It's a myth that women with red hair can't wear red lipstick," says Shaw. "If you have red hair, however, you might want to shy away from reds with orange undertones. Instead, go with a lipstick that has a blue or brown undertone — it's important you pick the right shade."

That's the main problem with Von D's lips. The orange undertones are pretty visible and definitely conflict with her even brighter hair. Von D's shade of choice also doesn't do much to complement her skin tone. "Fair-skinned women should look for a red with blue undertones to pull off more of an Old Hollywood look," says Shaw. "If you have medium skin, pick a lipstick with brown undertones to add warmth to your skin. For darker skin, a burgundy-based shade will give you a sultry, modern look."

NEXT: See which celeb pulled off the red pout best.

Move over, brunette. There's a new hair color in town this fall. Celebs everywhere have been going dark with the latest, deep red auburn shade. Some have even gone as far as trading in their typically lighter locks for a walk on the red side. Take a look at who easily rocked this new trend, and who needs a color check. Last, get tips from Denis De Souza, colorist at the Andy Lecompte Salon in New York on how you can go auburn.

Evan Rachel Wood's Too Bright and Brassy Hue: FAIL

There are a few things wrong with this shade on Wood. Since she is super fair skinned, the brightness of the color washes her complexion out completely. The other beauty foul here? Her makeup.

"If you're going to change hair colors, more often than not you will need to change your makeup palette," says De Souza. "Cooler colors often complement warmer red tones and should be used instead of bright, vibrant colors so they don't clash." Though Wood's neutral eyes bring out her hue nicely, her pink lips don't mix well with her new color.

If you're looking to try this trend, De Souza says to give your stylist your hair history upfront. "Bring pictures so that you make sure you are both on the same page and talk about the different options to achieving the color that you want."

It's also important that you make sure you can handle the upkeep of a new dye job. "You may have to color your hair more frequently to keep its vibrancy and prevent fading," warns De Souza. "Red tones wash out more easily, so a great way to maintain your color is to ask for a red tone gloss to revive the warmth of the shade. At home, try not to shampoo every day and when you do, make sure it's a pigmented shampoo and conditioner like Davines Alchemic Copper Shampoo and Conditioner."

NEXT: See who nailed this shade with flying colors.

Emma Stone's Auburn Strands: SCORE

No question about it, Stone sets the bar high for her gorgeous and glossy dark red color. That's because, according to De Souza, she's matched the deepness of her shade with her skin tone. "The great thing about hair color is that you can choose from several tones within that hue," he says. "Darker, deeper reds will always suit women with fair skin and lighter eyes."

Though Stone is naturally fair skinned (and blonde!), this color actually brings out her complexion. "As the weather cools down, we tend to look pale and washed out. Red tones will warm up the skin and soften the face," says De Souza.