Williams' debut album, The Right Stuff, was released in 1988, featuring a mix of urban dance-pop and adult contemporary balladry. The title track was a decent-sized hit, and the ballad "Dreamin'" became Williams' first Top Ten single, going all the way to number one on the R&B charts. The Right Stuff went gold, and Williams subsequently appeared in several TV movies. Her 1991 sophomore set The Comfort Zone was a star-maker; it spawned another R&B chart-topper in "Running Back to You," but the real story was the ballad "Save the Best for Last," a ubiquitous across-the-board smash that became Williams' first number one hit on the pop charts. The title track solidified Williams' growing reputation for smooth, sexy adult pop, and the album went on to sell over two million copies. In 1993, Williams' duet with Brian McKnight, "Love Is," became another huge hit when it was featured on the soundtrack of Beverly Hills 90210.