By Amanda Michelle Steiner
July 15, 2015 at 11:43 PM EDT
Hunter Abrams/BFA; John Shearer/MTV1415/Getty Images for MTV

With VidCon kicking off in just one week, it’s time to meet its stars.

Tyler Oakley, one of the most-streamed YouTube personalities on the Web, has achieved massive crossover success. His enthusiastic fan base has not only led him to two Teen Choice Awards but he has been able to raise hundreds of thousands of dollars per year for The Trevor Project, a non-profit organization focused on suicide prevention among LGBTQ youth.

YouTuber iJustine has been vlogging for nearly nine years — her claim to fame? The 300-page iPhone bill she received back in 2007 for going over her data plan. By a lot.

VidCon is an online video conference set to take place July 23 – 25 in Anaheim, California.

For more on these and more of the hottest stars of YouTube, head to People for a comprehensive gallery on everything you need to know.