02/27/2008 AT 04:30 PM EST
She's a fashion designer, a pop star – and now, an avant-garde model? Yep, that's Gwen Stefani
looking fierce on the March cover of V Magazine
. While Mui Mui-clad Stefani has perfected her high-fashion moue for the cover, the singer really opens up in her interview, getting emotional when talk turns to her son, Kingston, 21 months. "I'm gonna start crying when I talk about this because it’s just so ... it's so intense," she tells the magazine. "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."
The singer, who is expecting her second child
, also adds, "It's fun trying to get pregnant."