Lauren Conrad opted for a dark,yet playful, red and navy floral print Moschino ruffled hem mini-dress. With strappy booties, the Hills hottie put her fashion foot forward because — after all folks — she is a designer.(Photo: Fame Pictures)

Taraji P. Henson — always one of the best-dressed in our book — stepped out in a black and white strapless Roberto Cavalli bustier mini-dress and flirtatiously tossled hair. Sexy French maid chic, the Oscar nominated beauty took a fab fashion risk — and it worked!(Photo: WENN)

Hayden Panettiere turned it out in a sophisticated, yet energetic, Emanuel Ungaro halter mini-dress with silver trim. The Heroes starlet finished off her flouncy look with Bally platform peep-toe slingbacks, and jewels by Van Cleef and Arpels.(Photo: WENN)

Sienna Miller earned best dressed last night, in a fabulous long-sleeved Swarovski-encrusted, emerald green Twenty8Twelve mini
dress with strong shgoulders. Accessorizing with a silvery clutch and high-stepping Nicholas Kirkwood heels, the British Actress’ casual glamour played well to the casual, hip vibe of the MTV Movie Awards.(Photo: WENN)

Leighton Meester rocked a not-so-simple black Emilio De La Morena cut-out dress along with purple Brian Atwood ankle booties. The curve-clinging dress flaunted the Gossip Girl’s figure while showcasing her edgy style!
(Photo: WENN)

Atrocious hair aside, Megan Fox still makes the best-dressed cut in a super-short black and gold brocade Dolce & Gabbana strapless cocktail dress and super strappy Christian Louboutin sandals. The Transformers bombshell has the body, the fashion, and is simply in need of a hairstylist.(Photo: WENN)