A screengrab from “Last Week Tonight with John Oliver.” Credit: Last Week Tonight with John Oliver/YouTubeIf you’re a fan of HBO’s “Last Week Tonight with John Oliver,” you may remember an episode from about four years ago, where host John Oliver absolutely dumps on Live Nation and Ticketmaster, accusing the conglomerate of holding customers and musicians hostage with fees and essentially having a “chokehold” on the live entertainment industry. “Ticketmaster does share fees with other parties,” said Oliver. “In fact, the DOJ recently alleged that the company had repeatedly strong-armed venues into using Ticketmaster and retaliated against or threatened venues that did not use its services.” Well, now Live Nation has apparently “strong-armed” the Emmy-winning writer and comedian John Oliver to visit St. Petersburg’s Mahaffey Theater for one night only on Tuesday, Dec. 29.