Britney Spears has defended her decision to become a young mother - insisting she wants to have the energy to enjoy motherhood. The singer is pregnant with her second child and will be a mother of two by the time she is 25. But she maintains, "I always wanted to be a young mom. My mom was a young mom and I've looked up to her. "I think by being a young mom I'll have more energy in being able to bring up more positive kids. But there are parents that are 40 that do a damn good job."