Mary-Kate and Ashley Olsen caught a flight out of a Paris airport last night. The girls are on the go again following a fun few days in France. They arrived in time to check out some of the last Paris Fashion Week shows, including Kanye West's first collection. Both Mary-Kate and Ashley seem to be good friends with Kanye, though only the former has been linked to him romantically. The latest looks on the runway aren't the only outfits currently interesting Mary-Kate and Ashley. The Olsens were decked out in leather and a variety of pop culture costumes for a Halloween-themed video to promote their StyleMint website.