PewDiePie/YouTubeA lot of YouTube stars collected viewers and fans over time, but for some, there's one video, or one moment, that really proved they had what it took to be a bona fide internet star.
We picked a few of our favorite YouTubers and found the videos that skyrocketed them to success.
You'll recognize a few: Bethany Mota, PewDiePie, and even Justin Bieber, who got his start posting a cover of a Chris Brown song to YouTube.
But if there's one thing that's certain - they've all come a long way over the years.