Bauer-Griffin | Getty Images for DFI
stepped out for designer Karl Lagerfeld's dinner party in Paris, France in March wearing this super-sexy Balmain dress. Weeks later, Kim Kardashian rocked a very similar frock from the designer's collection to the premiere of her boyfriend Kanye West
's "Cruel Summer
" short film at the Cannes Film Festival, also in France. While Perry pulled the look together with open-toed sandals and an electric-blue 'do, Kim let her famous curves do the talking, slicking her hair back and donning black ankle booties.
So who do you think wore Balmain's designs best -- Katy or Kim? Cast your vote and click to see the next fashion face-off below!