If you thought Britney Spears had recovered her lost marbles after two years of relative calm, think again, say hotel staffers who have seen her Stewie impression.

According to reports, Britney, who has a history of odd behavior (and British accents, no less) is baffling staff by impersonating the baby from Family Guy.

The pop star has taken to trotting around the Mondrian Hotel reciting Family Guy quotes and mimicking the troubled child, who speaks with a British accent.

Is Britney Spears slowly losing it again?

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."

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

We have nothing to add.

For those unfamiliar with Stewie, who's voiced by Family Guy creator Seth MacFarlane, he's obsessed with world domination and plots to kill his own mother.

Sounds kinda like Britney, come to think about it! If her feud with dad Jamie keeps escalating, he should probably watch his back, too! Girl's gone haywire!