Jem Aswad Executive Editor, Music As expected, the United States Department of Justice sued Live Nation and Ticketmaster for antitrust violations on Thursday, a move that could change the shape of the multibillion-company that is the world’s largest live entertainment organization and owns Ticketmaster, North America’s biggest ticket vendor. The antitrust lawsuit claims that the company has a monopoly on ticketing through its Ticketmaster division, and that it illegally uses monopoly power to dominate the ticketing business and quash competition.