Britney Spears is focusing on her sons while trying to revive her career by working diligently on her newest album, a source in the U.S. pop singer's camp says.

The unidentified source said Spears was spending more time with her boys, Jayden James, 1, and Sean Preston, 2, and is trying to get the album done by the end of the year, the New York Daily News reported Sunday.

"She's the best I've seen her in three years," the source said. "She has her kids back now and she's working on a new album."

The pop star's renewed focus comes just months after she spent time in a psychiatric institution after divorcing singer Kevin Federline.

The 26-year-old singer's most recent album, "Blackout," did not reach platinum status and Spears soon became hounded by paparazzi, the Daily News noted.

The source said Spears will likely concentrate on her family rather than tour in the near future.

"She's taking every opportunity to see her kids, and the last thing she'll do is tour for three months or take the lead in a feature and be away from them again," the source said.