Kesha is suing her longtime producer Dr. Luke for sexual assault and battery that, according to the lawsuit, went on for 10 years. The disturbing claims, discovered by TMZ, document years of sexual, physical, emotional, and verbal abuse from the well-known producer towards Ke$ha which includes a time where he reportedly made her snort something before getting on a plane, and once on the plane, he forced himself on her while she was drugged.

She's asking to be released from her contract with Luke, who she says was a reason behind her well-documented eating disorder, which was first reported on earlier this year. TMZ received the following statement from Kesha's lawyer on the matter:

Kesha's lawyer, Mark Geragos, tells TMZ, "This lawsuit is a wholehearted effort by Kesha to regain control of her music career and her personal freedom after suffering for ten years as a victim of mental manipulation, emotional abuse and an instance of sexual assault at the hands of Dr. Luke."
Geragos adds, "The facts presented in our lawsuit paint a picture of a man who is controlling and willing to commit horrible acts of abuse in an attempt to intimidate an impressionable, talented, young female artist into submission for his personal gain. Kesha is focused on moving her life and her career beyond this terrible time."

Dr. Luke has not responded to said claims yet, according to TMZ, but we will continue to update when details from this story emerge.

UPDATE: Dr. Luke is suing Ke$ha for extortion, according to TMZ. In the new report, Luke claims that Ke$ha is lying about her claims of abuse and the she is only doing it to get out of her binding contract with him. He also claims that the whole thing is an extortion scheme from Ke$ha and her new management team to get out of the deal by spreading false information about him. We will continue to update this story as it develops.

[via TMZ]