Gwen gave birth to her first child, son Kingston, with her rocker boyfriend Gavin Rossdale, in May of this year.
The 'Hollaback Girl' singer admits she is keen to expand her L.A.M.B fashion line.
She said: "We will soon see L.A.M.B competing with Donna Karan's DKNY. The idea is to do the fashion for the rest of my life, although I hate saying it because if it folds everyone will know how much it hurts. There's not a lot of emotional drainage that comes with it. It's fun and rewarding but it doesn't really drain you.''

In other news, Gwen Stefani has hinted she is ready to quit her pop career to be a
full-time mum.
The singer, who is preparing to release her second solo album 'The Sweet
Escape', was constantly broody before having baby son Kingston with her
musician boyfriend Gavin Rossdale.
Gwen loves being a mother so much she often thinks about walking away from
music so she can spend all her time with her child.
She said: "It's all I ever thought about. I would love to just sit at home
with Kingston and eat pizza."
Gwen, 37, has also revealed she never intended to release another solo
record because her only ambition after the success of 2004's 'Love Angel
Music Baby' was to have a baby.
The singer - who gave birth to Kingston on May 26, 2006 - explained to
Australia's Daily Telegraph newspaper: "I never intended to do another solo
record. It's, like, kind of embarrassing talking about it. But I had a
couple of amazing leftover tracks from the last one. but I really wanted to
have a baby. Now I have both. I'm just going with the flow.''