Trolls Try to Convince Beliebers to Shave Their Heads by Spreading Rumor that Justin Bieber Has Cancer Neetzan Zimmerman · 10/26/12 11:50AM Internet trolls earlier this week launched a concerted effort to get Justin Bieber fans to shave their heads for the bubblegum pop star by assaulting every social network with the "shocking news" that Bieber was diagnosed with cancer.