@GigiHadid and @BellaHadid stopped by their stylist sister Alana's launch party for her bag collab with @LouAndGrey on the eve of NYFW. How do the sisters communicate about all things style? "We have a sister chat, " says Alana (@lanzybear). "All sisters have one, but we have a little more fun with it." More on Alana and the Hadid reunion tomorrow on Glamour.com. #alanahadidxlouandgrey (