The Celebrity: Soulja Boy
The Social Media Blunder: Threatened to hunt Chief Keef down and murder him on Facebook in April. He later claimed that his Facebook had been hacked. But Keef responded to him on Twitter by telling SB to call him.
Why It Was Such A Fail: Although it seems as though Soulja wasn't involved in this fail, it took him a really long time to regain control of the situation and let people know that he wasn't actually trying to get at Keef. So this very well could have escalated into something way worse than it did.
Photo Credit: HipHop2013