An infamous online beef comes to a close on a new version of Perry’s 2013 song “Legendary Lovers” Chief Keef and Katy Perry (Getty Images) Remember 2013? It was the age of “Get Lucky,” Modern Vampires of the City , Yeezus …and an infamous Chief Keef and Katy Perry X-neé-Twitter feud. Whether you recall that last piece of music history or not, the two artists on either side of it do—and now, they’ve decided to lay their decade-plus-old swords aside on a new version of Perry’s song, “Legendary Lovers.” Listen to “Legendary Lovers (Save Me)” below. To back up a little, the rapper and singer-slash- amateur-astronaut got into their online scuffle over a 2013 post Perry shared about Keef’s song “Hate Being Sober,” the title of which she said made her “have serious doubt for the world.” After the rapper responded with a threat to “ smack ” Perry, she apologized for offending him, noting: “I was really just having a general opinion on our generations…desire to be constantly intoxicated.” In turn, the rapper…