Rom-com chic!

From classic Hollywood glamour to modern bombshell, the stars brought their fashion A-game at the premiere of New Year's Eve in Los Angeles Monday night.

PHOTOS: See what all the stars wore last night

The film's star Lea Michele, 25, opted for a nude embellished Valentino gown with a daring plunging neckline. She wore her hair in glossy side-swept waves and accessorized with Christian Louboutin shoes and Neil Lane jewels.

"Thank you to my amazing glam team @marktownsend1 and @melaniemakeup @EsteeStanley I love you guys!!!!!!" She tweeted to her hairstylist, makeup artist and stylist for helping her prep.

Fergie, who attended the premiere to support her hubby Josh Duhamel, dazzled in a silver strapless Monique Lhuillier dress with Christian Louboutin heels and Tiffany & Co. diamond studs. The 36-year-old singer also styled her hair in side-parted waves and rocked red lips.

Sofia Vergara enhanced her killer curves in a bustier-style black dress. The Modern Family star, 39, accessorized with a bright red clutch and wore her super-long hair in soft curls.

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Watercooler Poll

Who Was the Best Dressed at the New Year's Eve Premiere?

Lea Michele
Fergie
Sofia Vergara