The 28-year-old singer has become obsessed with animated US TV show 'Family Guy' and has reportedly been wandering around Los Angeles' Mondrian Hotel mimicking the voice of troublesome baby Stewie, whose English accent is voiced by show creator Seth MacFarlane.

A source said: "Britney has developed a real fascination for 'Family Guy'. She's been staying in the hotel's penthouse suite and has been watching box sets."

Britney has been addressing hotel staff in the voice much to their amusement.

The source to The Sun newspaper: "She really likes Stewie and has been trying to copy his British accent. It's a bit weird, especially when she's in the gym speaking like a camp Brit."

This is not the first time Britney has spoken in a British accent.

The pop star apparently adopted English pronunciation during her stay at the Cedars-Sinai Medical Center in Los Angeles when she arrived there in January 2008 for treatment.

She was also videoed numerous times trading her Louisiana twang for UK inflections.

A source said: "She had the English accent thing going the whole time. It didn't stop."