A Japanese businessman ordered to stay away from pop idol Britney Spears has sued the singer, saying her security guards pointed a gun at him and caused “extreme emotional distress”.

A Japanese businessman has been ordered to stay away from pop idol Britney Spears after a California judge ruled he was “was abnormally obsessed and fixated with the singer.”

Britney Spears has asked to have a restraining order imposed against a 41-year-old Japanese man she claims has been stalking her since September.