Ariana Grande takes legal action against anonymous hackers.

The singer claims the hackers infiltrated the devices of people in her inner circle, stealing unreleased music, private photos and behind-the-scenes footage that was later sold online, Billboard reports. In a lawsuit filed on Monday in California, Grande points to a years-long hacking campaign targeting people in her orbit who had access to unreleased materials. The complaint doesn't identify the alleged hackers. Instead, the outlet reports, Grande will likely seek court approval to issue subpoenas to internet service providers, and online platforms to uncover the individuals behind the attacks through their digital footprints.