Following the success of 12 Play, Kelly became a demand as a writer and producer. May 24, 1994, Kelly's protégé Aaliyah released her debut album titled Age Ain't Nothing But a Number which was entirely written and produced by R. Kelly. The album peaked at number 18 on the Billboard 200 and sold over three million copies in the United States. Age Ain't Nothing But a Number spawned two hit singles: "Back & Forth" (U. S. Hot 100: #5, U. S. R&B: #1); blocked Kelly's "Your Body's Callin' from the top spot and "At Your Best (You Are Love)" (U. S. Hot 100: #6, U. S. R&B: #2). Kelly also wrote and produced the female R&B duo Changing Faces first two hit singles, "Stroke You Up" (U. S. Hot 100: #3, U. S. R&B: #2) and "Foolin' Around" (U. S. R&B: #9). During this time, Kelly also became widely known for his remixes. He remixed his own songs, Bump N' Grind, Sex Me and "Homie Lover Friend", a remix featured on the A Low Down Dirty Shame (soundtrack) along with Aaliyah's song, "The Thing I Like" which was written and produced by Kelly, as well. Kelly remixed songs for other artists including Aaliyah, Barry White, and Toni Braxton. He produced the remix for Janet Jackson's 1994 hit "Any Time, Any Place" which was featured on Jackson's remix album, Janet Remixed.