Teenagers of the 90s forever lusted over the smoking-cool style of Gwen Stefani. Train-track braces, electric blue hair and an ever-growing collection of tank tops; the No Doubt singer has evolved to become one of the most influential style icons of our time. She's a pro in mixing masculine and feminine pieces, sporting cute crop-tops alongside baggy tartan pants and a pair of Doctor Marten boots, then finishing it all off with her signature red pout. From Harajuku Lover to California Ska chick, Gwen is one badass chameleon when it comes to reinventing her image.