This week on the red carpet: YOU grade the looks — POLL

This week, Jessica Chastain wore Elizabeth Taylor's jewels, Sharon Stone flashed a little side boob and lots of leg, Nicole Kidman stepped out in the dress that Anne Hathaway was reportedly suposed to wear to the Oscars. In addition to the action in Cannes, Lea Michele and Bradley Cooper walked the red carpet in Hollywood, while Zach Galifianakis and Gwyneth Paltrow stepped out in London.

Who nailed their look and who was a fashion fail? Click through the gallery to grade the looks.

In Cannes, Jessica Chastain wore a Versace Collection gown — complete with cape! — and Elizabeth Taylor's stunning Bulgari sapphire and diamond necklace to the 50th anniversary screening of Cleopatra.

NEXT: Sharon Stone

Sharon Stone hit the De Grisogono bash in Antibes in a red hot one-shoulder Roberto Cavalli gown with a thigh-high slit, open back, and cut-out detail.

NEXT: Lea Michele

In Los Angeles, Glee star Lea Michele brought major sex appeal to the 2013 L.A. Screenings Lot Party in a lingerie-inspired black dress by Roberto Cavalli.

NEXT: Bradley Cooper

At the Hollywood premiere of The Hangover Part III, Bradley Cooper walked on the wild side in a custom rust colored Gucci suit.

NEXT: Gwyneth Paltrow

Gwyneth Paltrow was ready for summer in a Prabal Gurung shirtdress and Tom Ford sandals when she hosted a GOOP party in London.

NEXT: Nicole Kidman

Is this the dress Anne Hathaway was supposed to wear to the Oscars? Cannes juror Nicole Kidman hit the premiere of Nebraska in the Valentino Couture gown.

NEXT: Janet Jackson

At the annual AmfAR Cinema Against AIDS gala, Janet Jackson went minimal in an Armani Privé suit and Giuseppe Zanotti platform sandals.

NEXT: Zach Galifianakis

In London, Zach Galifianakis was mad for plaid at the European premiere of The Hangover Part III.

NEXT: Heidi Klum

Heidi Klum chose a strapless white and gold frock from Marches for the annual AmfAR Cinema Against AIDS gala.

Read more:

• Jennifer Aniston strips down in 'We're The Millers' trailer, Lea Michele signs a book deal, and more
• See all the stars at EW's Comic-Con party
• Red Carpet Roundup: Step and Repeat!