Premise: "Breathe" is a country pop song written and performed by American singer-songwriters Taylor Swift and Colbie Caillat. Produced by Nathan Chapman and Swift, it is the seventh track from Swift's second studio album, "Fearless" (2008). The song was written about the end of a friendship. Musically, the song is driven by acoustic guitar.
Hypothesis: Taylor Swift and Colbie Caillat wrote and performed a song together.