"Ain't No Other Man" is a song recorded by American singer Christina Aguilera for her fifth studio album, Back to Basics (2006). It was released on June 6, 2006 by RCA Records as the lead single from the album. The song was written by Aguilera, DJ Premier, Charles Martin Roane, Kara DioGuardi, and Harold Beatty, and was produced by Premier. "Ain't No Other Man" is described as a pop/R&B and funk song that incorporates elements of soul, blues and jazz music. Lyrically, the song was inspired by her marriage to Jordan Bratman in 2005.

"Ain't No Other Man" received generally favorable reviews from music critics, who complimented the track's musical style and deemed it as a standout on Back to Basics. It won a Grammy Award for Best Female Pop Vocal Performance at the 2007 ceremony. Commercially, the track peaked at number 6 on the US Billboard Hot 100 and was certified platinum by the Recording Industry Association of America (RIAA) for shipments of one million copies. Elsewhere, the song reached the top five of record charts of several countries including Australia, Italy, New Zealand, and United Kingdom.

A music video for "Ain't No Other Man" was directed by Bryan Barber. The video jumps back in time and depicts Aguilera as her then newly established alter ego Baby Jane. The visual was praised for the "mature" image that Aguilera adopted. It earned four nominations at the 2006 MTV Video Music Awards, including Video of the Year. Aguilera performed "Ain't No Other Man" during several television performances, including the 2006 MTV Movie Awards and the 2007 NBA All-Star Game. The track was also included in the set list of her Back to Basics Tour (2006–07).

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