"Just a Fool" is a duet recorded by American singer songwriters Christina Aguilera and Blake Shelton for Aguilera's seventh studio album, Lotus (2012). It was written by Steve Robson, Claude Kelly, and Wayne Hector and was produced by Robson. "Just a Fool" was sent to contemporary hit and hot adult contemporary radio stations in the United States by RCA Records as the second and final single from the album on December 4, 2012. The song is a country pop ballad which discusses the pain of a break-up. It is also Aguilera's first country song.

Following its release, "Just a Fool" received mostly positive reviews from music critics, who complimented the track's sound. Commercially, the single peaked at number 71 on the US Billboard Hot 100 and number 37 on the Canadian Hot 100. As of April 2015, the single has sold 802,000 digital copies in the United States according to Nielsen SoundScan. To promote Lotus and the song, Aguilera and Shelton performed "Just a Fool" on the third season of American television singing contest The Voice on November 19, 2012, and on The Ellen DeGeneres Show on December 7, 2012.

Following the release of her sixth studio album, Bionic (2010), which failed to generate impact on charts worldwide, Aguilera filed for divorce from her husband Jordan Bratman, starred in her first feature film, Burlesque and recorded the accompanying soundtrack. She then became a coach on NBC's singing competition show The Voice and appeared as a featured artist on Maroon 5's single "Moves Like Jagger" (2011), which spent four weeks atop the US Billboard Hot 100 chart. Following these events, Aguilera announced that had plans to begin production of her seventh album, stating that she wanted high quality and "personal" songs for the record. Regarding the creative direction, she revealed that the album would be a "culmination of everything I've experienced up until this point ... I've been through a lot since the release of my last album, being on ('The Voice'), having had a divorce ... This is all sort of a free rebirth for me." She further said "I'm embracing many different things, but it's all feel-good, super-expressive [and] super-vulnerable." Aguilera continued to say that the album would be about "self–expression and freedom" because of the personal struggles she had overcome during the last couple of years.

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