Here's what it's like to attend YouTube's VidCon - a digital-themed paradise for 20,000 teenagers

VidCon, YouTube's annual convention that unites the stars with thousands of teenaged fans, is like a boy-band concert on acid.

Flocks of shrieking teeny-boppers and their reluctant parents descended on Anaheim, California, for the chance to pose for selfies with their favorite internet celebrities, attend workshops on digital content creation, meet people their age, and pose for more selfies.

This year, more than 20,000 attendees are expected at the three-day conference.

After spending Friday at the convention, I quickly realized I stepped into a teenage-dream straight out of Katy Perry's cupcake-filled consciousness. Here's what it was like.