text: duo halloween costumes Become the ultimate duo this Halloween with your bestie with one of these amazing BFF costume ideas. From Daria and Jane to Cher and Amber from Clueless, you and your best friend will be the life of the party. Halloween Duos, Matching Halloween Costumes, Best Friend Halloween Costumes, Hallowen Costume, Cute Halloween, Halloween Outfits, Bambi Costume, Clueless Halloween Costume, Party Costumes