She claimed the company put her and other female artists in "physical danger" by supporting Dr Luke's behaviour, reported Ace Showbiz.
In an amended complaint filed in Los Angeles Superior Court, Kesha, whose real name is Kesha Rose Sebert, said Sony "had knowledge of Dr Luke treating female entertainers under his tutelage and supervision in the same manner as alleged here regarding Ms Sebert, which includes both physical and emotional abuse."
She alleged that the recording company not only didn't curtail Dr Luke's behaviour but also "placed JANE DOE female artists, including Ms Sebert, in physical danger by giving Dr Luke full creative and business control, with nearly limitless financial resources, over young female artists who necessarily were compelled to become dependent upon his goodwill."
While Sony has not commented on the issue yet, Dr Luke called Kesha's claim "baseless and unsupported."
"It's a further pleading full of the same baseless and unsupported allegations and a claim that smacks of desperation. In our view the amendment is ill advised and does not serve the plaintiff in any way."
Back in March, Kesha won the first round in her case against Dr Luke. At that time, New York Supreme Court justice Shirley Werner Kornreich ruled that Kesha's California lawsuit should move ahead of Dr Luke's New York lawsuit.