"Ain't No Other Man" is a song by the American singer Christina Aguilera from her fifth studio album Back to Basics (2006). Aguilera co-wrote the song with Kara DioGuardi, Charles Martin Roane, Harold Beatty and the producer DJ Premier. "Ain't No Other Man" is a pop, funk and R&B song that incorporates elements of soul, blues and jazz music. Lyrically, the song was inspired by her marriage to Jordan Bratman in 2005.

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.