"Un-Break My Heart" is a song by American singer Toni Braxton for her second studio album, Secrets (1996). The song was written by Diane Warren and produced by David Foster. It was released as the second single from the album on October 7, 1996, through LaFace Records. The song is a ballad about a "blistering heartbreak" in which the singer begs a former lover to return and undo the pain he has caused. It won Best Female Pop Vocal Performance at the 39th Annual Grammy Awards in 1997. It has sold over 10 million copies worldwide and nearly 3 million in the United States alone, making it one of the best selling singles of all time.

Toni Michele Braxton is an American singer, songwriter, actress and television personality. She has sold over 70 million records worldwide and is one of the best-selling female artists in history. Braxton has won seven Grammy Awards, nine Billboard Music Awards, seven American Music Awards, and numerous other accolades. In 2011, Braxton was inducted into the Georgia Music Hall of Fame. In 2017 she was honored with the Legend Award at the Soul Train Music Awards.