Christina MarÃa Aguilera is an American singer-songwriter and actress. Growing up, Aguilera aspired to be a singer, known locally as "the little girl with the big voice", singing in local talent shows and competitions. Aguilera is a soprano, having a vocal range spanning four piano octaves (from Bâ™2 to Câ™¯7). Since the start of her career Aguilera's voice has been compared to that of Mariah Carey and Whitney Houston. Aguilera frequently blends elements of pop, R&B, and soul music into her projects, her records typically include a combination of ballads and uptempo tracks. Aguilera has reinvented her public image on numerous occasions throughout her career.