Christina María Aguilera is an American singer, songwriter, actress, and television personality. Referred to as the "Voice of a Generation", she is noted for her four-octave vocal range, musical reinventions, sustaining high notes including use of the whistle register, and a signature use of melisma throughout her music. Recognized as an influential figure in popular music, she also became known for incorporating controversial themes such as feminism, sexuality, LGBT culture and the sex-positive movement into her work. Aguilera was also honoured as a Disney Legend, for her contributions to The Walt Disney Company.

When describing popular music artists, honorific nicknames are used, most often in the media or by fans, to indicate the significance of an artist, and are often religious, familial, or most frequently royal and aristocratic titles, used metaphorically. Honorific nicknames were used in classical music in Europe even in the early 19th century, with figures such as Mozart being called "The father of modern music" and Bach "The father of modern piano music". They were also particularly prominent in African-American culture in the post-Civil War era, perhaps as a means of conferring status that had been negated by slavery, and as a result entered early jazz and blues music, including figures such as Duke Ellington and Count Basie.