Christina María Aguilera ( AG-il-AIR-ə, Spanish: [kɾisˈtina maˈɾi.a aɣiˈleɾa]; born December 18, 1980) is an American singer, songwriter, actress, and television personality. Recognized as an influential figure in music and having received widespread public interest, she is noted for her four-octave vocal range extending into the whistle...