Spears, who has two sons, Sean Preston, five, and Jayden James, four, with second husband Kevin Federline, got secretly engaged to long-term boyfriend Jason Trawick when the 39-year-old talent manager asked the question by writing her a romantic poem.
After filling the ground floor of the couple’s Los Angeles mansion with roses and candles, Jason reportedly presented the 29-year-old with a flower-shaped diamond ring, reports the sun newspaper.
"She’s on cloud nine," femalefirst.co.uk quoted a source as saying.
The ‘Toxic’ hitmaker also looking forward to plan her first child with Jason, but only wanted to do it once she had tied the knot again.
"Britney is desperate to settle down again and have more children. But she is very traditional and didn’t want to start a family with Jason until they’d tie the knot," the source added.