Britney Spears is reportedly feeling "very nervous" and is "panicking" over the release of her ex-husband Kevin Federline's tell-all book on fatherhood.
The chart-topping songstress, 41, is thought to be worried about any revelations Kevin might make in his memoir about their previous spats.
She tied the knot with Kevin, 44, in October 2004 – but their marriage was short-lived.
