J.T.’s got a looney.

Justin Timberlake has secured a restraining order against an accused stalker.

A Los Angeles judge granted the “SexyBack” hitmaker a protective order against Karen J. McNeil on Friday.

McNeil was placed in protective psychiatric custody by police on Thursday after she trespassed at the singer’s L.A. home for the third time this week, says Justin’s attorney, who describes the 48-year-old homeless woman in court filings as a “mentally unstable celebrity stalker.”

Several years ago, McNeil was banned from getting close to rocker Axl Rose, who she claimed was her husband. She was sentenced to a year in prison after repeatedly disobeying a court order banning her from coming within 300 yards of the Guns N’ Roses star’s property.

The judge will consider whether to grant a three-year restraining order at a Nov. 9 hearing.