It's the place where YouTube stars, fans and creators meet.
VidCon is a celebration of all things online video. It's a chance for YouTube creators, fans and stars to meet, greet and learn from each other.
Last year nearly 20,000 people attended the show - about 40% of them were between the ages of 13-17. That tells you a lot about the YouTube audience, and shows you the growth potential here.
VidCon runs July 23-25 in Anaheim, California.
See all of Rich's pictures from VidCon here.