[Billy]

Britney Spears stuck up for herself during a radio interview and defended her parenting skills, saying that she is doing the best she can.

The singer was slammed by a court for having a life that was "too chaotic" and for not communicating with her two sons earlier this week.

But Spears has spoken out about her parenting skills, telling Ryan Seacrest: "It's sad, how cruel the world can be. At the end of the day, you've just got to know in your heart you're doing the best you can."

She also insisted that she was trying to not let the media coverage surrounding her ongoing custody battle with ex-husband Kevin Federline get to her.

On Tuesday Spears was granted three monitored visits to see two-year-old Sean Preston and one-year-old Jayden James per week - two afternoons and one overnight