London, Jan 6 (ANI): Britney Spears made a chilling phone call to her 16-year-old sister, Jamie Lynn hours before her Jan 3rd stand-off with police, telling her that she was about to hit global headlines, it has been revealed.

According to sources, before the arrival of police, the 'Toxic' singer called up Jamie Lynn, who has been at the centre of a media storm since announcing her teen pregnancy.

Insiders say that Britney was jealous of her sister's new-found publicity, and thus decided to make the shocking call, predicting that she on the verge of attracting media worldwide.

"Jamie's new-found publicity enraged jealous Britney," News of the World quoted a source, as saying.

"And after calling Kevin that night she rang Jamie and told her, 'You're not going to be the only f***ing Spears on the front cover of a magazine next week!' and then hung up," the source added.

Following the singer's hysterical antics, a Los Angeles judge has awarded the "sole legal custody and sole physical custody" of Sean Preston, 2, and Jayden James, 1, to Federline, until another hearing on January 14. (ANI)