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, use of the whistle register, artistic reinventions,...
—Katherine Center in Everyone is Beautiful
—Yong Kang Chan in Empty Your Cup
—Ursula K. Le Guin in The Dispossessed