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Best dressed: Rihanna in Moschino

Get Rihanna's sequined look

Best dressed: Jennifer Lawrence in Prada

Get Jennifer Lawrence's winter white look

Best dressed: Jennifer Connelly in Louis Vuitton

Get Jennifer Connelly's patterned look

Best dressed: Jennifer Aniston in Giambattista Valli

Get Jennifer Aniston's floral look

Best dressed: Gwyneth Paltrow in Safiyaa

Get Gwyneth Paltrow's ultra sleek look

Worst dressed: Kristen Stewart in Torn by Ronny Kobo

Get Kristen Stewart's striped look

Best dressed: Alexa Chung in Alexa Chung for AG

Get Alexa Chung's denim look

Best dressed: Jessica Chastain in Saint Laurent

Get Jessica Chastain's fit-and-flare look

Best dressed: Chloe Grace Moretz in Valentino

Get Chloe Grace Moretz's gold lace look

Best dressed: Miley Cyrus in Balmain

Get Miley Cyrus' white jumpsuit look

Best dressed: Nicole Kidman in Nina Ricci

Get Nicole Kidman's metallic blue look

Best dressed: Anne Hathaway in Protagonist

Get Anne Hathaway's winter white look

Best dressed: Hilary Duff in Rani Zakhem

Get Hilary Duff's two-toned look

Worst dressed: Lena Dunham in Creatures of the Wind

Get Lena Dunham’s colour blocked look

Best dressed: Reese Witherspoon in Michael Kors

Get Reese Witherspoon’s black and white look

Best dressed: Rosamund Pike in Alexander McQueen

Get Rosamund Pike’s floral look

Best dressed: Marion Cotillard in Christian Dior

Get Marion Cotillard’s sophisticated look

Best dressed: Julianne Moore in Alexander McQueen

Get Julianne Moore’s sporty look