Gigi + Bella and Kendall + Kylie were obvious choices when Olivier Rousteing went about casting sister duos for the Balmain Fall 2015 ads. But who knew Joan Smalls had a sister? Introducing Erika Smalls, everyone. Feeling like that one is the game-changer here.

Photos via Balmain. Read more about Gigi Hadid's makeup routine in her Top Shelf After Dark and Top Shelf.