The lawsuits are flying between a well-known singer and her longtime producer. The singer-songwriter and rapper Kesha filed a lawsuit against producer Dr. Luke alleging he sexually, physically, verbally and emotionally abused her for 10 years, TMZ.com reports.

The website reports separately that Dr. Luke responded with a lawsuit of his own, accusing Kesha of trying to extort him and making up false accusations in an attempt to get out of her contract with him.

“According to a new lawsuit — obtained by TMZ — Kesha claims Dr. Luke was abusive towards her almost from the get-go — when she signed on with him at 18 — and made repeated sexual advances toward her,” TMZ reports. “She claims he would force her to use drugs and alcohol to remove her defenses.”

In Luke’s lawsuit, filed hours after Kesha’s, “he says the pack of lies is being engineered by Kesha’s mother, Pebe, and Kesha’s new management firm,” TMZ reports. “Luke claims Kesha tried to extort him by threatening to spread lies about him to a blogger who started a ‘Free Kesha’ website unless he released her from her recording contract.”

Among the accusations in Kesha’s suit is one alleging that Luke once forced her to snort something just before they boardad a plane, and then during the flight he “forced himself on her while she was drugged,” TMZ reports.

“On another occasion, Kesha claims after forcing her to drink with him, Dr. Luke gave her what he called ‘sober pills.’ Kesha claims she woke up the following afternoon, naked in Dr. Luke’s bed, sore, sick … and with no memory of how she got there,” TMZ reports.

Christine Lepera, a lawyer for Luke, characterized Kesha’s suit as part of “a campaign of publishing outrageous and untrue statements,” the website reports.

Kesha