song!" When Warren played the finished song to Arista Records' future president (2000-2004) L.A. Reid, he thought it would fit Braxton's then upcoming album. When "Un-Break My Heart" was sent to Braxton, she expressed dislike for the song. According to Warren, "Toni hated the song. She didn't want to do it." Reid was able to convince Braxton to record it, and it later became her signature song. Following the recording sessions of the song, Braxton approached Warren and explained why she was skeptical about recording it, further explaining that she didn't want another "heartbreak track". Recording sessions occurred at The Record Plant and Chartmarker Studios in Los Angeles, California in the same year. "Un-Break My Heart" was released as the second single from Secrets on November 11, 1996. Composition Produced by David Foster, "Un-Break My Heart" is a four minute-25 second pop and R&B power ballad. The song's theme alludes to a "blistering heartbreak" in which the singer begs a former lover to return and undo the pain he has caused. David Willoughby, author of The World of Music (2009), said a few phrases such as "Don't leave me in all this pain" are sufficient to reveal the "sadness and the longing" in the song. Warren showcased Braxton's contralto voice with a low vocal range. According to sheet music published by Realsongs at Musicnotes.com, the verses of "Un-Break My Heart" are composed in the key of B minor, and the piece modulates to D minor for the chorus and G minor for the bridge; the song is set in a time signature of common time with a moderately slow tempo of 55 beats per minute. Braxton's vocal range spans from the low note of D3 to the high note of D-Sharp/E-Flat5. The song was remixed by several DJs such as Hex Hector, Frankie Knuckles and Soul Solution. As noted by Jose F. Promis of AllMusic, the songin its original form, was a massive adult contemporary and pop hit, and, with its larger-than-life chorus, worked equally well as an unstoppable dance number, even if the vocals were never re-recorded.The "Soul-Hex Vocal Anthem" remix, with a length over nine minutes, was influenced by tribal house music; while the "Classic Radio Mix" is a piano-driven house music edit. A Spanish version of "Un-Break My Heart", titled "Regresa a Mi", was included as a bonus track on Secrets. The CD-single of "Un-Break My Heart"