The Internet-obsessed already know how colossal the online video industry has become, but the more "offline" among you are about to find out. For the fifth consecutive year, everyone and anyone involved in online content (a.k.a. independent creators, viewers and supporters) gather for a three-day international blowout across over 150,000 square feet of the Anaheim Convention Center. Industry professionals and fans alike will gain access to the expo hall and festival, live performances and panels, plus meetups with their favorite YouTubers. Over 100 special guests will be in attendance, including Grace Helbig, iJustine, Tyler Oakley, Rhett and Link and dozens more. Be sure to nab your event passes stat—they're selling faster than it took for that "First Kiss" video to go viral.