Butterfly is the sixth studio album by American singer-songwriter Mariah Carey, released on September 10, 1997, by Columbia Records. The album contains both hip hop and urban adult contemporary sounds, as well as some softer and more contemporary melodies. Throughout the project, Carey worked with Walter Afanasieff, with whom she had written and produced most of the material from her previous albums. She also worked with many famed hip hop producers and rappers, such as Sean "Puffy" Combs, Q-Tip, Missy Elliott and the Trackmasters. With the latter acts producing most of the album, Butterfly deviated from the adult contemporary sound of Carey's previous albums.

With Butterfly, Carey continued the transition that began with previous album, Daydream (1995), which pushed her further into the R&B and hip hop market and away from the pop background of her previous work. Carey was able to reflect her creative maturity and evolution in the album's writing and recording. Carey writes in the booklet of her twelfth studio album, Memoirs of an Imperfect Angel (2009), that she considers Butterfly her magnum opus and a turning point in both her life and career.

Five singles were released from the album; two worldwide commercial singles and three limited-release singles. "Honey", the album's lead single, topped the charts in Canada and the United States, and reached the top-five in New Zealand, Spain and the United Kingdom. The album's fifth and final single, "My All", became a top-ten hit throughout Europe and topped the charts in the United States. To promote the album, Carey embarked on the Butterfly World Tour, which visited Australia, Japan and Taiwan, with one show in the United States. Butterfly was nominated for three Grammy Awards at the 40th Annual Grammy Awards.

Butterfly received acclaim from music critics, many of whom embraced Carey's musical transition. Reviewers complimented the album for its mature sound and production, as well as Carey's musical direction. Though released during Carey's heavily publicized conflict with Sony Music, the album became an international commercial success, topping the albums charts in many countries, including Australia, Canada, Greece, Japan, the Netherlands, as well as the United States. It was certified five-times Platinum by the Recording Industry Association of America (RIAA) in the United States and received the Million Award in Japan. Globally, Butterfly has sold over ten million copies.