The leaders of the Senate subcommittee that held a hearing into Ticketmaster last month shared evidence with the Justice Department and asked it to "continue examining" the company's conduct.

The first round of tickets to Beyoncé's highly anticipated Renaissance world tour go on sale next week. Ticketmaster is under pressure to avoid a repeat of the Taylor Swift debacle in November.

The lawsuit, filed Friday, alleges fraud and antitrust violations, among other claims. Nearly 400 more people have since shown interest in joining and will be added as plaintiffs, a lawyer tells NPR.

The overload of fans trying to buy Taylor Swift tickets caused major tech issues. The singer responds that her team was assured the demands would be met.