With her clarion mezzo-soprano and girl-power lyrics, Natasha Bedingfield came to represent a certain streak of mid-'00s pop: feisty, determined, and not afraid to let her hair down and have fun. Some of Bedingfield's biggest songs found their power in her straightforward delivery, whether she was making declarations of love or striking up rallying cries for young women taking their first steps toward adulthood. Later hits allowed for a little more brooding to creep in, but Bedingfield's voice—and appeal—remained unwavering.