Washington, April 9 : Pop princess Britney Spears and her ex husband Kevin Federline have apparently rekindled their `once red-hot sex life'.

According to Star magazine, Spears and Federline have been hitting up hotel suites, dressing rooms and even backstage on the singer's `Circus' tour to do the deed.

"It's like they're newlyweds all over again," Fox News quoted a family insider as telling the mag.

"Brit and Kevin can't keep their hands off each other! The flings have made them both a lot happier," the insider added.

However, Federline's girlfriend, ex-volleyball star Victoria Prince, is hardly thrilled.

According to Star mag, Prince busted Britney and Kevin in the act. (ANI)