Age Ain't Nothing but a Number is the debut album by American recording artist Aaliyah, released under Jive and Blackground Records on June 13, 1994, in the United States. After being signed by her uncle Barry Hankerson, Aaliyah was introduced to recording artist and producer R. Kelly. He became her mentor, as well as the lead songwriter and producer of the album. The duo recorded the album at the Chicago Recording Company in Chicago, Illinois. The album featured two hit singles, including the top ten-charting "Back & Forth" and "At Your Best (You Are Love)"; both singles were certified Gold by the Recording Industry Association of America (RIAA). Two additional singles followed: "Age Ain't Nothing But a Number" and "No One Knows How to Love Me Quite Like You Do".
Age Ain't Nothing But a Number received generally favorable reviews from critics. Many noted Aaliyah's vocal ability and praised the lyrical content. Aaliyah was credited for redefining R&B by blending her voice with Kelly's new jack swing. The album peaked at number 18 on the Billboard 200 and sold over three million copies in the United States, where it was certified double platinum by the RIAA. The album was certified Gold in Canada by the Canadian Recording Industry Association (CRIA) and Silver in the United Kingdom by the British Phonographic Industry (BPI) to date. The album has sold over five million copies worldwide.