It's almost summer, and Demi Lovato is still wearing black tights, but this multi-patterned shirtdress is really cute.

Flashy monochromatic suits are not for every father-son duo, but it works for Will and Jaden Smith.

Sure, she's wearing studded, hot-pink stiletto booties, but the rest of Jennifer Lopez's look is suprisingly subdued. She should adopt this less-is-more attitude more often.

We're not sure about the oddly pointed bodice on Jane Krakowski's dress, but this almost-neon orange is a great color on her.

If anyone can wear head-to-toe Versace (yes, the gold-fringed sandals, too), it's Heidi Klum. Her hair looks great in this long, straight, middle-parted style she's been favoring lately.

We love the little peek-a-boo inserts in Christina Ricci's black halter dress, and the pointy gold pumps are a good accent.

Between the feathered legs and bird's nest hair, Nicole Kidman's look is a little too avian for our taste.

Audrey Tatou stuns in this gorgeous Prada gown. We wouldn't change a thing.

Uma Thurman is the living embodiment of a movie star in this dramatic silver Versace gown, coupled with diamond earrings and cuffs, natch.

This deep purple is a great color for Jessica Chastain, and the embellishment on the gown is just stunning. But a ponytail seems too casual.

Marion Cotillard's look has a breezy, nautical feel, making it a perfect fit for Cannes. We love the pointy toes, skinny straps and white sole of the shoes.

This gown looks outdated and gives the lovely Rosario Dawson a square torso and linebacker shoulders. We doubt that was the intention.

The sheer patterning at the waist of Heather Graham's gown has a cut-out look, without the skin.

Milla Jovovich goes for the ethereal look in this ivory chiffon gown accented with shiny, pale pink and green flowers and leaves and a deep-V neckline. We love the hair here — bangs with a braid wrapped over the crown.

This is too much "lingerie" and too little "dress" for Lea Michele.

It's really all about getting the whole look exactly right, as Naomi Watts demonstrates. Red lipstick, shiny waved hair and delicate shoes all work perfectly with this vintage-style Dolce and Gabana dress.

OK, there's nothing super "fashion-y" about Minka Kelly's dress, but we like it for reminding us that we're still into the fun-colored-shoes-with-a-simple-black-dress trend.

We're used to seeing the floral maxi dress in a more flowing style. So, this structured corset top gives Padma Lakshmi's dress an original take, and we love the lush tropical colors.

Julianne Moore wears Dior Couture, but the overall look is not successful. The long train in the back ruins the simple lines of this design and the color blocking doesn't work.

Eva Longoria's nude-body-stocking gown is more suited to the trapeze bar than the red carpet.

Icy pink compliments Anne Hathaway's new platinum blonde 'do, but the dress design is striving for edgy and settles on odd.

We are dying to take a pair of scissors to that long black and white tail Kerry Washington is dragging around.

Kate Bosworth is waiting for the mothership to beam her up.

In an ensemble better suited to brunch with friends than a movie premiere, Krysten Ritter looks as though she just couldn't be bothered.

This vibrant tomato red looks great on Carey Mulligan, but she looks half-done. This called for a little more effort in the hair and makeup department.

The muted gold color of Nina Dobrev's pumps perfectly plays up the pattern on her dress and the square-necked halter style is great for showing off shoulders.

This busy floral pattern takes over the top half of Isla Fisher's gown and fades into an ocean of black fabric, creating a bottom-heavy silhouette.

Jennifer Morrison opts for a '20s style dress for the Great Gatsby premiere but ruins the vibe with these clunky platform pumps.

Is Martha Stewart really wearing gold sequined pedal pushers?? We're at a loss.

This mermaid-style gown is a red carpet standard, but the pattern is pretty and it's a chic, formal look for the normally flamboyant Katy Perry.

We realize that Zoe Saldana was going for a "futuristic" look for this Star Trek Into Darkness event, but the skirt just looks like a satin diaper.

The arrow-shaped neckline of Winona Ryder's dress is an interesting detail, and she accessorizes with three classics she often favors — pointy-toed black pumps, a small black clutch and a red lip.

The dress is cute but we really wish Kelly Osbourne would give the purple hair and shiny black platform pumps a rest.

We can't put a finger on it, but despite being a "wow" factor dress, Vanessa Williams looks a bit lackluster. Is it the fit? It seems the design could do with a bit more structure — or less. This seems to fall awkwardly in between.

Christina Ricci gets a hit mostly for demonstrating that white pumps can work with the right outfit. (We've been skeptical). The key seems to be a black and white motif — this pencil skirt and geometric-patterned top fit the bill.

Kyra Sedgwick's outfit seems all over the place. A camisole that is better suited for sleepwear, an '80s pantsuit and vaguely beach-y sandals just don't creative a cohesive look.

Coco is up to her usual tricks in tight spandex and splashes of Barbie Doll pink. We've seen her do better. (Well, at least once.)