The 37-year-old, who has been married to rocker Gavin Rossdale for four years, also confirmed she is keen to have more children soon.
She said: "Now I'm in a repeater zone. I just want to make babies and make records.
"I even wrote in a song, 'You seem like you'd be a good dad'. "Gavin has lived up to my expectations, more than. He has always been very loving and romantic."