Kesha is being countersued by her record company boss, Dr Luke.
The 41-year-old music producer, who runs Kemosabe Records, claims the 27-year-old 'Tik Tok' singer is a liar and is trying to extort him after she accused him of sexually, physically and emotionally abusing her for 10 years and forcing her to use drugs and alcohol.
In his lawsuit, filed just hours after the blonde beauty filed her own lawsuit, the music producer - real name Lukasz Gottwald - says her claims are lies being engineered by her mother, Pebe Sebert, and Kesha's new management firm, according to gossip website TMZ.com.
He also claims he's had a copy of a draft of Kesha's lawsuit for months and says she tried to extort him by threatening to file it and spread lies about him to a blogger who started a 'Free Kesha' website unless he released her from her recording contract.
In a statement, his lawyer, Christine Lepera, also said Kesha's claims are "scurrilous" and "false," and part of "a campaign of publishing outrageous and untrue statements."
She added: "Undoubtedly, Kesha's lawsuit is nothing more than a continuation of her bad and offensive acts."
The 'Blow' hitmaker, who sought treatment in rehab for an eating disorder earlier this year, has collaborated with Dr Luke on a number of her hits, including 'Die Young'.
He has also produced songs for Kelly Clarkson, Britney Spears, Katy Perry and One Direction.