From TechCrunch:
The story goes that Entertainment Weekly’s verified Twitter account tweeted out the following:
“Pop Star Justin Bieber was diagnosed with cancer earlier this morning. Bieber fans are shaving their heads to show their support.”
Justin apparently responded back saying thanks for the support, and a picture of the Twitter conversation along with two images of bald Bieber fans started making its way on the internet.
In reality, 4chan was trolling Beliebers. There were no tweets to begin with, and there definitely isn’t any cancer. 4chan peeps simply photoshopped together an image and sent it out into the world.
Oh 4Chan I love your wacky ways!