Yellow is a tough color to wear, but this shade actually works well on Gwyneth Paltrow. It's such a shame about the shoes — something strappier and lighter in color would be more appropriate for the dress and the season.

Gina Gershon's look is rather reminiscent of a bathrobe and slippers. That is not a compliment.

Yes, we know Ariel Winter is only 13, but something a little less My Pretty Pony would enhance her adorable face and figure, rather than distract from them.

Jenna Ushkowitz keeps it simple for this low-key event. The trendy "boyfriend" blazer provides a nice contrast with the girly minidress and peep-toes shoes.

Despite the fact that Camille Winbush is sporting the overused Herve Leger bandage dress, we still have to give her a hit — her body is made for this look.

The elaborate beading on Michelle Rodriguez's dress is gorgeous, and the simple lines of the dress keep it from going into tacky territory. The super high red heels may be a bit of a fashion risk, but we love them.

Lavender is striking on Castle's Tamala Jones, and the angled seams and ruching are figure-flattering. The large hoop earrings and simply pulled-back hair are a great choice.

Jessica Lowndes' outfit is just OK. We don't mind the dress, but a richer color would have worked better. And the tired nude shoes and bag need to go.

Spring green looks terrific on Kim Cattrall! She got all the details right, too — from the wide gold cuff to the light, fresh look of her hair and makeup.

Heidi Klum is one of the few people that can get away with a Halston-esque jumpsuit, but we'd like it better in a less drab color. And swap that leather belt for a skinny metallic one!

Did Fergie stop by between sets? This ensemble seems better suited to one of her concerts than this afternoon book launch party.

The combined effect of Karolina Kurkova's messy hair, minimal eye makeup and wrinkly gown give this look a just-rolled-out-of-bed quality.

The geometric pattern and colors on Kerry Washington's dress are pretty and offer a more unique look for the red carpet. We think several inches off the hemline would take this look up to hit status.

The matronly fit and color of Rose McGowan's gown will only serve to reinforce those Dixie Carter comparisons.

The nude dress has become a slightly dull red carpet standard in recent seasons. Minka Kelly gives it a fresh twist by pairing it with red accessories and bright coral nail polish.

The metal details holding this sleek, simple black top and skirt together give Anna Paquin's look a bit of post-punk edge. The chrome shoes actually work in this application.

So many celebs are trying out this bright orange-red color these days, and it actually works well on Hayden Panettiere. But we're not loving the Star Trek shoulders and plain black pumps.

The lace detail only serves to give the impression that Courteney Cox's slip is hanging out from underneath her skirt.

The shades of blue and textured quality of this cute dress are really working for Emma Roberts. The chunky shoes and severe hairstyle are another story.

Neve Campbell makes a stylish return to the red carpet. The subtle Jacquard pattern on the dress, black patent slingbacks, and chunky gold earrings add nice elements of interest to an all black look.

The fit of this wrap dress totally accentuates Connie Britton's bangin' bod. Add the beautiful color and the soft metallic accessories, and this look couldn't get any more flattering.

Renee Zellweger rocks this modern take on the trench. The vermillion hue, shortened length and nude accessories provide a stylish twist to this classic look.

It's all just too much. The layers of chiffon, the fake jewels dripping off the shoulders, the chrome shoes, the extreme tanning. Ashley Tisdale needs an intervention.

Though we could do without the peach lipstick and giant hoop earrings, the rest of Bai Ling's look could very nearly be considered classy.

Yes, we know the monochromatic suit is Russell Brand's "look." But even he looks tired of it here. And the pointy metallic shoes are appalling, even by his standards.

Jennifer Garner's outfit seems to be best suited for a guest spot on The Office.

Usually a sexy senior, Helen Mirren goes for a more covered-up look. The ivory color is flattering, and while there is nothing really "wrong" with this look, we prefer her more adventurous choices.

Did Rachael Leigh Cook raid Elle Fanning's closet for this look? This girlish dress and lunchbox-style bag are reading a bit on the young side for this 32-year- old.

This redhead sure knows the flattering power of green. Though she uses this trick often, Marcia Cross keeps it fresh here by pairing this satin dress with burgundy heels and a gold bag.

With the oversized fit and mismatched accessories, Lisa Edelstein looks like she spent the afternoon playing dress-up in grandma's closet. We won't even talk about the color.

There's a reason the high-waisted jean went out of style after the '70s. If Emmanuelle Chriqui can't make them look good, nobody can.

On the plus side, Fortuny pleats are on trend, and the peachy color is pretty. But the droopy fit is unflattering on Robin Tunney's petite frame. Additional points off for overuse of bronzer.

Nia Vardalos lets the flattering fuschia color of this otherwise simply designed dress do the talking. The turquoise earrings and bracelet add an unexpected pop of contrasting color.

Kellie Pickler forgoes her usual over-the-top country princess look for something a little more subdued — and it suits her.

Did Uma Thurman just crawl out of a sarcophagus?

Niecy Nash looks perfectly cute — for a pool party.