On Sunday night at the American Music Awards, Iggy Azalea struck an uncommon pose: a towering white woman onstage thanking a diminutive black man who believed in her, had given her an opportunity, and provided her the credibility to penetrate an unforgiving community. Her provider, the rapper T.I., awkwardly pinched Azalea’s shoulder as she spoke, a wide and huckster-y grin etched onto his face, reaching up to evince some measure of pride and ownership. And with Azalea’s victory — over genre megastars Drake and Eminem — a loop closed. The blondes won. But they couldn’t have done it alone.