"Just a Fool" is a duet recorded by American singer songwriters Christina Aguilera and Blake Shelton for Aguilera's seventh studio album, Lotus (2012). The track was written by Claude Kelly, Wayne Hector, and its producer Steve 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.
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, also reaching number one in Ukraine, and number four in Iceland. As of 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.