Machine Gun Kelly is known for his wild behavior but there is this one person he wish he had never messed with - Eminem. When Eminem's daughter was a teenager, MGK made inappropriate comments about her on social media and Eminem just couldn't let it go. The feud turned ugly when both sides started dissing each other and MGK made accusation about Eminem hindering his career. Watch what Eminem does next and why MGK's career faded after his feud with the King of Rap.