Why Margot Robbie is getting slammed for her Halloween costume as she breaks one important rule: 'She's treading a thin line'

Blanca Blanco dresses up as Barbie for Halloween! The actress has on the pink fitness look from movie starring Margot Robbie

Margot Robbie goes incognito behind a V For Vendetta mask as she attends Casamigos Halloween party in Los Angeles

Kelsea Ballerini Dresses Up as Barbie for Halloween - See Her Transform Into Margot Robbie's Character