London, Aug 31 : Seems like Britney Spears has babies on her mind nowadays ever since getting into shape for her Femme Fatale tour.

The singer and her fiance Jason Trawick are reportedly keen to start a family once her gigs are wrapped up at the end of the year.

The 29-year-old pop star, who has sons Sean Preston, 5, and Jayden, 4, with ex-husband Kevin Federline, is said to have convinced her former manager that they should try for a baby.

"She's always wanted a big family but also wants to prove to herself and to her family she is a good mother. She wants another chance to put things right," a source told The Sun.

"Now she's finally had the green light from Jason, she can't wait," she added. (ANI)