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Gwen Stefani is InStyle’s November cover girl! In this issue, the rock star designer opens up about doing so much in so many arenas—fashion (she launches her third line Harajuku Mini for Target mid-November), music (a new No Doubt album is slated for next year), and family (“being a mother is probably the most challenging thing I do,” she says of parenting Kingston, 5, and Zuma, 3, with husband Gavin Rossdale). What’s her secret? “At work I’ve learned how to delegate. You don’t have to be on a ladder in a warehouse, micromanaging. You can be at home. And teamwork is also such a big part of marriage and parenting.” She also delves into another area of expertise—beauty. “My hair color is L’Oréal, but I won’t reveal the number,” says Stefani, a spokesperson for the brand. “And I do my roots as often as Marilyn Monroe did hers. I’m serious. I found out.” Though, she wasn’t always blond. “Right after we came home from the first No Doubt tour I felt like I might get recognized, so I colored my hair red. And I hated it.” As for her famous red lips? “The makeup goes on every day, even if I’m not going anywhere.” For more of our exclusive interview, pick up the November issue, on newsstands Friday, October 21st.

Cover: Marchesa dress, Lorraine Schwartz bangles. Photo: Diane Von Furstenberg gown, Van Cleef & Arpels necklace, MCL by Matthew Campbell Laurenza bracelets. 

Plus, click through to see the complete Harajuku Mini for Target collection!

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Punk rock princess-turned-designer Gwen Stefani wrapped up New York Fashion Week with a rocking runway show last night for her L.A.M.B. Spring 2011 collection. Before the show started, sons Kingston and Zuma, husband Gavin Rossdale and No Doubt bandmates Tony Kanal and Tom Duman hung out backstage with Stefani. Front row celebrities included Debbie Harry, Mel B (wearing a black L.A.M.B. catsuit), rap mogul Russell Simmons and fellow designer Christian Siriano. “I feel like a lot of people, me included, have been wearing a lot of black, white and gray, so we decided to go really colorful. [This collection] is kind of this dance-all African queen,” she told us. It’s fun to have all those prints and I think prints are definitely hard to do and do them good, but we really pulled it off with this collection.” We loved the eclectic mix of maxi skirts, harem pants, T-shirts and crop tops, all styled in Stefani’s signature style. But the moment that really stole the show? When a leather jacket-clad Kingston hopped up on stage during the finale to congratulate his mom.

See the entire L.A.M.B. Spring 2011 collection.

–Rachel Jacoby, with reporting by Lauren Tumas