Weezer frontman Rivers Cuomo occasionally posts short Instagram videos of himself covering rap hits on acoustic guitar. That’s just a thing he does. In the past, he’s done Rae Sremmurd’s “Come Get Her,” Fetty Wap’s “Trap Queen,” and Post Malone’s “White Iverson.” And now he’s posted another Malone cover, “Congratulations,” which comes along with a…
