15. Bald For Bieber
Back in October of 2012, a screenshot from the official Twitter of Entertainment Tonight was spread on the internet, announcing that superstar Justin Bieber was diagnosed with cancer. The tweet encouraged fans to shave their heads to show their support for him, and to hashtag their images #BaldForBieber. Fans went crazy, shaving their heads and posting photos. Fortunately, this hoax was stopped when a few sources revealed that some trolls on 4Chan started it.