Hundreds of fans of Taylor Swift, Beyoncé and other musicians filed a lawsuit accusing Ticketmaster and its parent company Live Nation of price gouging, alleging both companies have colluded with venues to increase the price of tickets—marking the latest complaint against Ticketmaster following a federal antitrust lawsuit filed earlier this year.

A group of nearly 400 Taylor Swift fans and other concertgoers filed a lawsuit in California state court against Ticketmaster over price gouging. Taylor Swift fans are suing Ticketmaster and its parent company Live Nation with allegations of colluding with partner organizations to intentionally drive up ticket prices.

Taylor Swift fans have accused Ticketmaster and its parent company of conspiring with third parties to inflate concert ticket prices in violation of a law originally meant to target organized crime.