Gwen Stefani Blossoms for Harper's Bazaar Cover

Looking sophisticated and proper on the September cover of Harper's Bazaar, Gwen Stefani reveals that she can rock more than just a red lip and punk style. Instead, she's showing off a Barbie doll pink look, right down to her fuchsia lips.

For the upcoming issue -- which happens to be the magazine's largest in its 145-year history -- Stefani was transformed into a modern day "My Fair Lady" in a pink Jil Sander gown and decadent hat by Alexis Mabille Couture. Her regal look continues inside the mag, as she drips with designer labels like Alexander McQueen, Oscar de la Renta, the Row and Versace.

"I've always been a girl who loves to dress up," the No Doubt frontwoman 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."

In the interview, the singer opened up about her style, staying fit, balancing a career and motherhood, and more. "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," she said.

Harper's Bazaar's September issue hits newsstands Aug. 21.