(L-R) Actress Bella Thorne, actress Zendaya, and internet personality Cameron Dallas onstage during FOX's 2014 Teen Choice Awards at The Shrine Auditorium on August 10, 2014 in Los Angeles, California.
Kevin Winter—Getty Images
YouTube stars with a penchant for truth-telling are now controlling teens' hearts and wallets. That's bad news for the Hollywood PR machine.