Famous Punjabi folk singer Nachattar Gill and three of his aides were today booked for allegedly raping a model on pretext of arranging "good assignments" for her. A case of rape and criminal conspiracy was today registered against Nachattar Gill and his three friends. "The case was registered after detailed investigations on the complaint by a Special Investigation Team,which had been formed to probe the complaint," Additional Deputy Commissioner of Police,Ludhiana,Nilambri Jagdely said. Police said that a complaint was filed by a young woman of Haibowal area with the Ludhiana's Commissioner of Police. She has alleged that Gill and three of his friends had raped her "several times",first time in a Chandigarh hotel,police said. The victim has claimed that the singer and his friends had promised to arrange good assignments for her as she was an upcoming model.