"If I Ain't Got You" is a song by American singer-songwriter Alicia Keys from her second studio album The Diary of Alicia Keys (2003). Inspired by the 2001 death of singer Aaliyah, the terrorist September 11 attacks, and other events in the world and in Keys' life, the song is about "how material things don't feed the soul." The single cover depicts Keys similarly to the subject of Man Ray's 1924 painting Le Violon d'Ingres. Released on February 23, 2004, as the album's second single, "If I Ain't Got You" peaked at number four on the US Billboard Hot 100 and became Keys' second consecutive R&B chart-topper, remaining atop of the Hot R&B/Hip-Hop Songs chart for six weeks. The song received two nominations at the 2005 Grammy Awards, for Song of the Year and Best Female R&B Vocal Performance, winning the latter. Keys herself said that it is one of her favorite songs. A remix featuring Usher, a Kanye West Radio Mix, and a Spanish-language version featuring Arturo Sandoval appear on the bonus CD of select international pressings of The Diary of Alicia Keys. The song was covered by singer Jordan Feliz in 2016.
Keys said that the idea of the song was inspired by Aaliyah's death: "The song idea came together right after Aaliyah passed away. It was such a sad time and no one wanted to believe it. It just made everything crystal clear to me—what matters, and what doesn't." In September 2020, Keys revealed that she almost offered the song to Christina Aguilera, as the singer wanted to work with Keys. She eventually wrote the song "Impossible" for Aguilera's album Stripped.