Gwen Stefani covers Harper's Bazaar (Photo : Harper's Bazaar)

Gwen Stefani is pretty in pink on the cover of the September issue of Harper's Bazaar - the largest issue in its 145-year history. The musical fashion designer wears a giant bright pink Alexis Mabille Couture flower hat and a soft pink Jil Sander Gown. Stefani traded in her bold red pout and wildly printed attire for a girly bubblegum style session.

Throughout the pages, Stefani stuns in elaborate designer pieces including a frothy tiered pink feather gown by Alexander McQueen and a sexy tight leather pink dress by The Row. The editorial transforms from "pretty in pink" to "bad girl black." Stefani dons a dramatic tulle wrapped Vera Wang bridal gown with leather gloves and baby pink rimmed sunglasses. In another shot, she's wearing a chic body-hugging Versace dress.

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"I've always been a girl who loves to dress up," the blonde bombshell told the magazine "I already put my makeup on twice today: I put it on to take my kid to school, and then I went home, washed my face, and put it on again to have lunch with you." She even wears make up at home. Stefani jokingly explains that makeup helps her husband to "like [her] more."

The No Doubt lead singer opens up about her motherhood, music career, family, and personal style.
On motherhood: "It's superfun being a mom, but it's hard too. Finding that balance between work and family is the hardest thing I've ever done-by far."

Which celebrity friend loves her Harajuku Mini baby-wear line: Charlize Theron who dresses her baby boy, Jackson, in Harajuku onesies.

On her signature red lip: The red lip came when her grandmother gave her a crimson lipstick when she was in high school. "I remember sitting in my ghetto, beat-up Honda Prelude and putting on that lipstick in the rearview mirror and being like, 'Uh-huh, I like that. That's the sh**t right there.' I never stopped after that."

On her famous platinum hair: She spent eight hours getting her hair lightened when she was 25. "It was like I'd unlocked the key. I remember feeling like, 'I have arrived. This is me. Finally.'"

On her organic fashion sense: "I did my own makeup, my own costumes; I did everything myself. I didn't even know there were stylists.

How the 42 -year-old manages to stay in shape: "There is no secret: You just have to eat healthy, work out, and torture yourself! [...]I like to wear clothes too much, so I try to keep focused."

On her overall transformation: "I went from being nothing, from being an ordinary, nerdy girl, to having power."

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