Christina María Aguilera

Christina Aguilera (born December 18, 1980) 

Christina Aguilera is an American singer, songwriter, actress, and television personality. 

Known for her four-octave vocal range and ability to sustain high notes,

she has been referred to as the "Voice of a Generation".

Aguilera is considered a pop culture icon and is generally described as a triple threat entertainer.

With estimated sales over 75 million records, she is recognized as one of the world's best-selling music artists; in 2009,

she was classified as the twentieth most successful artist of the 2000s by Billboard.