"My All" is a song by American singer-songwriter Mariah Carey from her sixth studio album, Butterfly (1997). It was released as the album's fifth single overall and second commercial single on April 21, 1998, by Columbia Records.
The song was written and produced by Carey and Walter Afanasieff. "My All" is built around Latin guitar chord melodies, and makes subtle use of Latin percussion throughout the first chorus, before taking on a more conventional R&B-style beat. Carey was inspired to write the song and use Latin inspired melodies after a trip to Puerto Rico, where she was influenced by the culture. The song's lyrics tell of a lonely woman declaring she would give "her all" to have just one more night with her estranged lover. It is the first song Carey wrote for the Butterfly album.
The music video for the song was released in March 1998. It shows many scenes of Carey laying on a submerged vessel in a large body of water, while lamenting her lost lover. Towards the video's climax, Carey and her love interest climb atop a lighthouse and caress each other under the night's sky.
"My All" was performed live on various occasions, including the 1998 World Music Awards and Blockbuster Entertainment Awards, Saturday Night Live, The Rosie O'Donnell Show and various European television and music chart programs. The song was also part of Carey's 1998 Butterfly World Tour, and was performed during many future tours and concerts. House music producer David Morales remixed the song, which was performed live as a medley with the original.
"My All" received acclaim from music critics and charted strongly throughout various music markets. In the United States, the song became Carey's thirteenth chart topper on the Billboard Hot 100, and was certified double-platinum by the Recording Industry Association of America (RIAA).
Throughout Europe, the song performed moderately, peaking at number four in the United Kingdom and in the top ten in Belgium (Wallonia), France, Spain and Switzerland. In France, due to strong sales, the song was certified gold by the Syndicat National de l'Édition Phonographique (SNEP).