Gwen Stefani says trying to get pregnant was "really a lot of fun."

The 'Wind It Up' singer, 38, is expecting her second child with hubby, Gavin Rossdale. The new baby will join 21-month-old son Kingston, whom Gwen calls "the best thing that ever happened to me."

"I'm going to start crying when I talk about this because it's just so intense. I put him to sleep at night and, you know, I'll be rocking him to sleep and he'll be playing with my hair and it's just the most amazing feeling in the world," Stefani says in an interview with 'V' magazine.

She says Kingston loves loud music and has learned to head bang like his rocker dad. "He sings a lot to himself. He is just getting into music. He does the whole head-bouncing thing. I love him so much."