Dr. Luke’s defamation case against pop star Kesha who filed a suit against him that included a sexual assault accusation just got more intense. They have recently subpoenaed Lady Gaga in his defamation suit against Kesha according to Rolling Stone. Gaga, a sexual assault survivor, has been an outspoken supporter of Kesha throughout the years-long ordeal, but Dr. Luke’s legal team alleges that Mother Monster has information regarding false statements Kesha made about Dr. Luke.

“Dr. Luke’s counsel served a subpoena on Lady Gaga because she has relevant information regarding, among other things, false statements about Dr. Luke made to her by Kesha. This motion has become necessary because Dr. Luke’s counsel has not been able to obtain, despite repeated request[s], a deposition date from Lady Gaga,” Dr. Luke’s representative said in a statement.

Kesha’s suit against the music producer dates back to 2014 when she sought to void all contracts with him alleging that Dr. Luke had “sexually, physically, verbally, and emotionally abused [Kesha] to the point where she nearly lost her life.” Dr. Luke sued Kesha in return and a judge ordered an injunction that prohibited Kesha from recording new music. Although, this summer, she’s back with Rainbow (due out Aug. 11) her first collection of new music in five years, and the single “Praying,” from the upcoming album is already a bona fide hit.

As the suits between Kesha and Dr. Luke heated up female celebrities including Taylor Swift, Kelly Clarkson, and Gaga all expressed support for Kesha, although Gaga was the most outspoken. Gaga who is about to go on the Joanne World Tour went all in for Kesha in an Instagram post from 2016, according to Rolling Stone:

The very reason women don’t speak up for years is the fear that no one will believe them or their abuser has threatened their life or life of their loved ones/livelihood in order to keep their victim quiet and under control. What happened to Kesha has happened to many female artists, including myself, and it will affect her for the rest of her life. No one needs to validate Kesha. Why is victim always the ‘liar’? Why do we let people in a position of power get away with behaving inhumanely? These guys hide behind the legal system and it’s their litigious behavior that is precisely what they use to rape these girls. ‘Give me what I want or else I will come after you’ and they have all the money and the resources to do it.

Dr. Luke’s legal team has pulled Gaga into the suit against Kesha, alleging that Gaga “joined Kesha’s ‘smear campaign’ against the producer and ‘spread negative messages,’ including a statement urging Sony Music to cut ties with Luke, according to court docs,” Billboard reported.

The move to involve Gaga comes after she spoke openly about her own sexual assault in an interview with Howard Stern that prompted Kesha’s lawyer at the time Mark Geragos to go rogue and tweet that Gaga’s assailant was Dr. Luke, which a rep for Gaga swiftly refuted.

Still, text messages that passed between Gaga and Kesha following the incident were entered into evidence in 2016, which a judge later sealed, according to Rolling Stone. Dr. Luke’s lawyers have subpoenaed Lady Gaga who is a sexual assault survivor to divulge the contents of the texts in Dr. Luke’s suit against the woman who accused him of assault.