In a complaint filed in Los Angeles Superior Court, Hall called O'Connor a "desperate, attention-seeker ... Now known perhaps as much for her bizarre, unhinged internet rants as for her music", according to The Hollywood Reporter.
O'Connor's biggest hit was "Nothing Compares 2 U," a cover version of a Prince composition released in 1990. About a week after Prince died in Minneapolis, O'Connor wrote that Prince was a "long time hard drug user" who "got his drugs over the decades" from Hall.
Hall also stated through the lawsuit that he hasn't had any contact with O'Connor in 25 years and that her accusation of criminal conduct is "extraordinarily damaging" to his reputation.
According to the complaint, "Ever since O'Connor posed her malicious and reckless lies about Hall on her 'OFFICIAL Facebook page' (where they have been commented on and forwarded thousands of times), her brazen lies have spread like wildfire across the media throughout the United States and the world ... ."
Besides seeking at least USD 5 million in compensatory damages, the suit also demands a punitive amount as a deterrence to others.