"Spanish Guitar" is the third single from Toni Braxton's third studio album, The Heat (2000). Released in 2000, the song was written by Diane Warren and produced by David Foster, the same team behind Braxton's 1996 smash hit "Un-Break My Heart". It was never released as a commercial single in the United States, causing the song to chart outside the top ninety-five of the Billboard Hot 100. This song remains a fan favorite as Braxton often performs the dance version live.

The song was present on the international soundtrack of the Brazilian soap opera Laços de Família (2000), causing a radio smash on the Brazilian radio stations and reached the top of the charts. The song becoming Braxton's signature song in Brazil and her most successful song in the country. In 2010 the song was recorded by flamenco guitarist Benise (with Kimberley Locke providing vocals) for his album also entitled "Spanish Guitar".

The song received mixed reviews from music critics. Stephen Thomas Erlewine from Allmusic called it "an effective ballad" and picked it one of the best songs of the album, alongside "He Wasn't Man Enough" and "Just Be a Man About It".CD Universe was largely positive, writing that "the appropriately titled "Spanish Guitar" marks an interruption of the other songs' predominantly electronic textures while remaining consistent with the sensuous, romantic mood." Barry Walters wrote favorably for Rolling Stone, stating that "Braxton's supple alto rests easily within mainstream R&B's smooove sonic furniture, her croons displaying husky quirks as the track goes through the multiplatinum motions on "Spanish Guitar," a Latin-conscious "Un-Break My Heart" clone.

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