Courtesy of Subject

1.8 MILLION: Subscribers to her YouTube channel

There's a zillion talented people on YouTube, but not many who've proved that they can hop channels and take most of their audience with them. When Helbig, 28, walked away from contract negotiations with My Damn Channel last year and instead started the independent channel it'sGrace, more than half of her 2.4 million subscribers followed. "It's important to own my content and to be completely independent," she says. Meanwhile, she's branching out, starring in February's online film Camp Takota and publishing her first digital book this fall.

First job: "I worked in a fitting room at T.J. Maxx."