This was probably the nastiest, scariest and quickest celebrity Twitter feud of all time.
Katy Perry took to Twitter to give her honest opinion about a new song, writing, "Just heard a new song on the radio called ‘I hate being sober’ I now have serious doubt for the world." Well, turns out that song was by 17-year-old rapper Chief Keef and, needless to say, he was not happy about what she thought.
Is it time to add Katy Perry to the long list of things Chief Keef doesn't like? Read what he said about the jump!