Un-Break My Heart is performed by Toni Braxton live. The heartbreak ballad song was written by Diane Warren and produced by David Foster, released as the second single from her second album Secrets in 1996. The song won Best Female Pop Vocal Performance at the 39th Annual Grammy Awards in 1997. It has sold over 10 million copies worldwide nearly 3 million in the United States alone, making it one of the best-selling singles of all time. "Un-Break My Heart" attained commercial success worldwide. In the United States, the song reached number one on the Billboard Hot 100, where it stayed a total of eleven weeks while reaching the same position on the Hot Dance Club Songs and Adult Contemporary component charts. When Billboard celebrated its 40 years of charting from 1958 to 1998, the song was declared the most successful song by a solo artist in Billboard Hot 100 history. In Europe, the song reached the top five in more than ten countries while peaking at number one in Austria, Belgium (Wallonia), Romania, Sweden, and Switzerland. Songwriter Diane Warren wrote "Un-Break My Heart" in 1995. When asked about her songwriting process, she said that songs usually come to her from a title, a chorus, or a drum beat. "Un-Break My Heart" was conceived from its title, and, according to Warren, "it popped into my head, and I thought, 'I don't think I've heard that before, that's kind of interesting.' I started playing around on the piano with these chords and did a key change, and then I knew, 'OK, this is magic.'" Warren further explained that she wrote "Un-Break My Heart" as a ballad and dance song because that was the way she heard it. She said: "some people only know it as a – gay – dance 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.