The No Doubt frontwoman graced the cover of InStyle's November issue, where she spoke of the effort that she puts into her famous style and beauty look.
She told the magazine that she tries on five outfits before leaving for a date with Rossdale, who she said "looks good in everything".
Stefani also confessed that she puts on make-up every day.
"The make-up goes on every day," she said. "Even if I'm not going anywhere."
Back in June, No Doubt revealed that they had almost completed work on their upcoming album. The new album will be the band's first since 2001's Rock Steady.
Stefani, who has previously discussed the challenges of balancing work and motherhood, recently teamed up with Target for a children's clothing line called Harajuku Mini.
Watch the video for No Doubt's 'Don't Speak' below: