David Cassidy became one of the biggest teen idols of the 1970s, starring as Keith Partridge on the musical TV sitcom "The Partridge Family," singing in a fictional family band which also featured his real-life stepmom, musical actress Shirley Jones. The show's producers hadn't planned to let any of the child actors actually sing on Partridge recordings along with Jones, but David Cassidy convinced music producer Wes Farrell that he was up to the job of singing lead vocals. Backed by the famous session musicians known as the Wrecking Crew, the Partridge Family albums went on to sell millions of copies, featuring hit songs such as "I Think I Love You." Cassidy also released a successful solo album, "Cherish," in 1972. Cassidy toured around the world performing before throngs of screaming girls; repeatedly, his concerts prompted mass mania reminiscent of the Beatles' arrival in America. After "The Partridge Family" was cancelled in 1974, Cassidy sought to be taken seriously as a rock musician. He achieved moderate success later in his career with a hit song in 1985, "The Last Kiss," which featured George Michael on backing vocals. For the rest of his life up through his final concert performances in 2017, Cassidy continued to perform onstage and make guest appearances on television. For a time in the 1970s, though, David Cassidy was one of the biggest stars on the planet. We remember him with a look back at his career.