EXCLUSIVE: Kesha has been served legal papers by Dr. Luke with the notice posted on her front door! The letter, from the Supreme Court of the State of New York has both of their names on the letter and has Kesha as the defendant. The notice outlines electronic filing of documents. The 27-year-old singer filed a lawsuit earlier last week against her longtime producer Dr. Luke, claiming that he "sexually, physically, verbally and emotionally abused" her for a decade. Dr. Luke immediately filed a counter-lawsuit with his lawyer describing her actions as part of "a campaign of publishing outrageous and untrue statements." The letter is posted on her front door in Venice, Los Angeles Pictured: Legal papers on Kesha's door