RELATED NEWS | Concert ticket caution: Woman's $45 tickets end up costing over $125 each The lawsuit claims that data breaches are "avoidable" and that Ticketmaster's parent company Live Nation failed to use proper preventative measures. Live Nation said it subsequently launched an investigation to learn what happened. On May 27, a "criminal threat actor" had offered to sell the data it allegedly stole from Ticketmaster on the dark web, according to the federal filing. "Defendant's security practices were ineffective since Defendant did not ensure its third-party vendors were responsible for implementing them," the lawsuit says.