Uma Thurman is head-to-toe fabulous in this hot pink Atelier Versace gown. The corset top and magenta lining are killer details.

Jennifer Lopez looks stiff and out of season in this shiny Tom Ford-by-way-of-Roberto-Cavalli dress. Her drab makeup is not helping the overall look.

Halle Berry — reigning queen of pregnancy chic — maintains her status with this flowy midi-style summer dress. We love the shimmery accents on the hem and neckline.

These pants are utterly unflattering on Debra Messing. The severe hairstyle is not doing her any favors either.

The print on January Jones' dress is gorgeous, but the fit seems off. A higher, cinched waist, coupled with a shorter hem, would improve things considerably.

Jessica Paré's '70s-mom-at-the-PTA-meeting is look not our favorite.

Sofia Coppola has worn some variation of this Peter Pan collar dress about a thousand times.

Midnight blue is a great color on Connie Britton. The floral pump is questionable, but we're warming up to it.

Taylor Swift's Emilio Pucci gown is underwhelming, and the cheesy sheer inset does nothing to enhance it.

Amy Adams' dress just makes us uncomfortable. We feel like we're looking at her naked — and strangely puckered — torso.

This summer's trendy citrus colors are a winner on Jessica Alba.

Hayden Panettiere's sharply tailored Helmut Lang blazer is a nice contrast to the softer style of her dress. The potentially too-heavy patent booties are balanced by the strong lines of the jacket.

Amanda Seyfried is just drowning in this Givenchy gown.

Amy Poehler's dress reminds us of everything that was frumpy about '80s fashion.

OK, it's not a standout look, but Sarah Silverman so rarely puts herself together well on the red carpet that we must give her some props for this cute crocheted number.

This outfit is a trying a little too hard for Gwen Stefani, and Gavin Rossdale is still trying to work his outdated '90s look.

The sleek and simple style of this gown works well on Ireland Baldwin's tall frame.

Wow! Linda Cardellini ditches her vintage Mad Men style for this edgy leather sheath dress. The chunky sandals and dangly earrings are nice accents.

Miranda Kerr's dress has a gorgeous watercolor-effect floral pattern, but we really love the details: the square, banded neckline and the multiple ankle straps on the shoe.

We're partial to this Prada gown in general, and this yellow version looks great on Kerry Washington.

The color of this peach satin dress is so complementary to Juliette Lewis' skin tone and hair color. But is matching one's shoe color to one's hair a do or a don't?

This mint green color is not working with Carrie Underwood's overly tanned look, and the shorts are just not dressy enough.

Emma Watson's cigarette pants and stilettos are probably the only thing that could have worked with the slightly odd peplum on this top. The result is cool and sexy. Plus: The pinned-up faux bob is a fun hairstyle experiment.