1. Smosh

   With just over 18 million subscribers, the comedy duo Smosh (Ian Andrew Hecox and Anthony Padilla) is one of the top YouTube acts in the game.

   Video: YouTube, Smosh

2. TheFineBros

   The FineBros, who make the popular “Kids React” videos and submitted for an Emmy nomination, boast nearly 9 million YouTube subscribers.

   Video: YouTube, TheFineBros

3. Bethany Mota

   Bethany Mota is among the biggest beauty/lifestyle vloggers on the internet with 6.5 million subscribers.

   Video: YouTube, Bethany Mota

4. Shane Dawson

   Shane Dawson is a YouTube star mainstay and is creeping up on 6 million subscribers. And check out that new haircut!

   Video: YouTube, Shane Dawson TV

5. Tyler Oakley

   With 4.6 million subscribers, Tyler Oakley is one of many YouTube stars to start in one city and make the move to Los Angeles.

   Video: YouTube, Tyler Oakley

6. Annoying Orange

   Annoying Orange creator Daneboe will be at Vidcon celebrating the channel’s recent 2 billion views milestone — a club that includes just over 100 channels overall.

   Video: YouTube, Annoying Orange

7. JoeyGraceffa

   The Massachusetts native treats his 3.5 million subscribers to a little bit of everything — he’s a gamer, singer, spoofer, actor — whatever suits his fancy.

   Video: YouTube, JoeyGraceffa

8. TomSka

   TomSka (real name: Tom Ridgewell) calls himself a “20something British Comedy Person” — which about says it all. He’ll be up over 3 million subscribers soon.

   Video: YouTube, TomSka

9. Kingsley

   Kingsley describes himself as “some goofy ass kid from Missouri” — good for 2.8 million YouTube subscribers.

   Video: YouTube, Kingsley

10. MysteryGuitarMan

    Joe Penna, a.k.a MysteryGuitarMan, uses animation, stop motion and other tricks to trick out his music vids to the delight of his 2.8 million subscribers.

    Video: YouTube, MysteryGuitarMan

11. missglamorazzi

    Ingrid Nilsen goes as missglamorazzi, and brings a mix of “beauty, fashion and healthy food how-to’s” to her 2.7 million subscribers.

    Video: YouTube, missglamorazzi

12. Grace Helbig

    Grace Helbig had some 2.4 million subscribers on her DailyGrace channel before leaving MyDamnChannel to strike out on her own. She’s rebuilt 1.8 million of those subscribers and is just getting re-started.

    Video: YouTube, Grace Helbig

13. Vlogbrothers

    Let’s not forget about Hank and John Green (yep, the one who wrote “The Fault in Our Stars”), who conceived of the very first Vidcon in 2010 and will make their return this week.

    Video: YouTube, vlogbrothers

Read more: http://mashable.com/2014/06/26/vidcon-2014-13-top-youtube-stars-youre-sure-to-see/