Katy Perry Sends Facebook Live to the Top of This Week's List of Emerging Facebook Apps

Facebook’s perennially active feed of life at its headquarters, Facebook Live, heads up this week’s AppData list of emerging Facebook apps, or those still under a million monthly active users, with over 400,000 MAU. At least that many people showed up to watch pop star Katy Perry meet Mark Zuckerberg, as well as demo some social networking tech.