Chief Keef and Katy Perry posted up together this week, Perry rocking Glo Gang merch, and the internet lost it . But the lore behind this goes back over a decade, and it is genuinely one of the better origin stories Twitter ever produced. Here is the timeline. In 2013, Perry tweeted some criticism aimed at Sosa's record “Hate Being Sober.” An 18-year-old Chief Keef responded the way an 18-year-old Chief Keef would: rapid-fire insults on the timeline, plus a tease that he was dropping a song called “Katy Perry.” Perry, apparently recognizing she had poked the wrong bear, came back with an apology and told him she actually liked the “Don't Like” music video. Sosa, to his credit, was surprisingly chill about the whole thing and accepted it . The beef was squashed in real time, on the public timeline, the way only early Twitter could deliver. Then came the musical thread that connects them across the years.…