AKB48's Yuko to cosplay as Serah on Launch Event

Because people have "liked" the ffxiii-2 "test-play" promotional site over 50,000 times on facebook Yuko will be dressing up as Serah on the launch event. If 70k people "like" the site Yuko will wear a different outfit (Lightning????). There's a third option as well, but Square Enix hasn't said how many "likes" it will take to reach that point.

 Source : ff-xiii 2