"The Voice Within" is a song by American singer Christina Aguilera from her fourth studio album, Stripped (2002). The song was written by Aguilera and Glen Ballard, with production handled by Ballard. It is a piano-driven ballad that talks about trusting oneself and one's instincts. "The Voice Within" was released as the fifth and final single from Stripped on October 27, 2003, by RCA Records.

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.