Gwen Stefani is on the cover of Seventeen's January issue, on newsstands now! In an interview with Terry Iacuzzo, Gwen talks about her realization that at 35?after 17 years with No Doubt?it was time to try something new. She explains what it was like to defy expectations and make her first solo album, and how it's made her feel more powerful than ever.

The article also features beautiful photos of Gwen shot by photographer Michael Wirth, and details on how you can enter to win a L.A.M.B. wardrobe chosen by her, starting January 1 at seventeen.com!