Oscars best and worst dressed

Clearly, Anne Hathaway needed a big dress for her big night! The Oscars cohost looks regal in a classy and strapless red Valentino gown with a voluminous, show-stopping train.

Best supporting actress nominee Amy Adams commands attention in her glittering, cap-sleeved L'Wren Scott gown. The Fighter star's loose, fiery waves and emerald-and-diamond Cartier necklace add pops of colour to the midnight look.

With its structured silhouette and graphic details, best actress nominee Nicole Kidman's Asian-inspired gown is just a little too busy. But at least the Rabbit Hole star's hubby, Keith Urban, is the perfect, handsome accessory!

Halle Berry turns heads in her jeweled, curve-hugging Marchesa gown -- and her dramatic tulle train adds an ethereal touch to her flowing frock.

Blue Valentine star Michelle Williams looks feminine and refined in her lilac, high-necked Chanel gown. The best actress nominee's gorgeous, elegant look is a fashionable change from her Golden Globes misstep.

See also: 101 fabulous maxi dresses

Her picture-perfect princess dress is the perfect choice for best supporting actress nominee Hailee Steinfeld. The full-skirted and beaded one-of-a-kind Marchesa gown keeps the 14-year-old True Grit star looking youthful, fun and glamorous for her first Oscars appearance. Even cuter: The teen star had sketched out her dream dress!

The Kids Are All Right star Annette Bening, a best actress nominee, shines in a metallic column dress. Plus, the vertical jewelled stripes add extra glamour - and drape her gorgeous figure perfectly!

See also: 101 fabulous maxi dresses

Black Swan star Mila Kunis looks lovely in lavender on the red carpet. The presenter mixes romance with sex appeal with her soft, drapey Elie Saab gown with sheer lace accents.

As always, best supporting actress nominee Helena Bonham Carter brings her own unique flair to the red carpet. The star of The King's Speech attempted to explain her gown's dramatic bustle, saying "I've got a bit of a complex with my bum, so I thought I'd make it even bigger." We love her sense of humor -- but with her shredded, velvet sleeves and messy, dated hair, Carter's costume-y look is a fashion miss.

See also: 101 fabulous maxi dresses

Less is certainly more for best actress nominee Jennifer Lawrence. The Winter's Bone star looks simple, subtle and red-hot in her understated Calvin Klein Collection gown and her soft, relaxed waves complement the look.

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Performer Gwyneth Paltrow lights up the red carpet in her shimmery Calvin Klein gown. The fierce frock shines like liquid gold -- and her sleek golden locks finish off the look!

Parenthood definitely agrees with this Oscar-winning duo! Just weeks after giving birth, Penelope Cruz shows off her sizzling post-baby body in a jewelled, ruby L'Wren Scott gown. And Cruz's handsome hubby, best actor nominee Javier Bardem, doesn't look too shabby, either!

See also: 101 fabulous maxi dresses

Jennifer Hudson is on fire in this super sexy tangerine gown. In fact, the presenter (and past best supporting actress Oscar winner) told Ryan Seacrest that when she first tried on the dramatic Versace dress, she never wanted to take it off. We can see why!

See also: 101 fabulous maxi dresses

Singer-actress Mandy Moore, whose song "I See the Light" from Tangled is up for best original song, looks grown up and glamorous in her sparkly Monique Lhuillier gown. Her elegant updo and luxe baubles help finish off the glittering look.

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Scarlett Johansson looks ladylike and refined in her burgundy, lace Dolce & Gabbana gown. The curve-hugging silhouette and cut-out back take the look from sweet to sexy.

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If The Fighter's Melissa Leo needed to check her makeup mid-show, her reflective dress came in handy! "I'm like a house of mirrors," the best supporting actress winner said of her stunning Marc Bouwer gown.

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We love that Cate Blanchett takes a red-carpet risk with her structured, lilac gown. But we're a little perplexed by the armor-like top, which looks like it's framing the actress' chest.

With its ombre, feathered skirt and sparkly, sequined top, previous best actress Oscar winner Hilary Swank's Gucci gown is a certainly a mix of trends. Luckily, the result is glam and gorgeous - not overdone.

Florence and the Machine's Florence Welch brings romance to the red carpet with her whimsical, vintage-inspired gown. We only wish the singer had stepped it up a notch and opted for a more eye-popping colour to complement her brightly hued locks - like the silky orange dress she wore for her Academy Awards' performance of the best original song "If I Rise" from 127 Hours.

See also: 101 fabulous maxi dresses

Camila Alves' plunging black dress is anything but basic! Matthew McConaughey's leading lady stuns in an uber-glam Kaufman Franco ballgown - and the side pockets add a playful touch.

Talk about sex appeal! Red-carpet veteran Sharon Stone proves she's definitely still bringing the heat in her one-shouldered Christian Dior gown. And her gravity-defying poof puts Snooki to shame!

Hot mama! In her smoldering, white-hot Giorgio Armani Prive gown, you'd never guess performer Celine Dion gave birth to twins just four months ago!

Blonde beauty Reese Witherspoon channels cinematic legend Brigitte Bardot with her flirty, retro updo. Her classic, black-and-white Giorgio Armani Prive gown is sophisticated and elegant, and her shining baubles (including her stunning engagement ring!) help dress up the look.

Last year's best actress winner Sandra Bullock follows the red-dress trend with her eye-catching Vera Wang stunner. But its beautiful, artful bustle helps Bullock's gown stand out from the pack.

From the waist up, Marisa Tomei's 1950 couture Charles James dress looks simple and elegant. But the eye-catching, full tulle skirt adds surprising element of drama to the vintage gown.