Key TakeawaysLive Nation shares hit a record high Tuesday morning after its earnings beat estimates.CEO Michael Rapino called it the company's "most active summer concert season ever," with demand for Taylor Swift tickets set to be followed by tours from Shakira and Coldplay next year.The ticket seller is still facing a DOJ lawsuit from earlier this year attempting to break up Live Nation and Ticketmaster. Shares of Ticketmaster's parent company Live Nation (LYV) surged Tuesday morning after the company's t ...