In December 1986, Brown released his first solo album, King of Stage. While the album sold modestly and scored one major hit with the ballad "Girlfriend," it failed to generate the level of excitement and acclaim for which Brown had hoped. Seeking to reinvent himself as an adult artist, Brown spent the next two years working closely with the acclaimed R&B songwriters and producers Teddy Riley, L.A. Reid and Babyface. The result of their collaboration, released in the summer of 1988, was a radically new R&B album called Don't Be Cruel that took the music world by storm, selling seven million copies on the way to becoming the bestselling album of the year. Brown's high-powered, sexually charged music and live performances earned him comparisons to his childhood idol Michael Jackson. In 1990, Brown recorded "On Our Own," the smash-hit theme song for the movieGhostbusters II, and in 1992 he released his third album, Bobby, featuring the singles "Humpin' Around" and "Good Enough."