20/20 Classics is a collection of the most memorable episodes of ABC's prime-time news magazine series that has brought viewers riveting investigative reports and illuminating celebrity interviews since its first broadcast in 1978. 20/20 typically concentrates on human interest issues that range from light-hearted stories to hard-hitting reports. This series has been famously hosted by Elizabeth Vargas and Barbara Walters, and it has featured such notable celebrity subjects as Lady Gaga and Rihanna. Many 20/20 reports have played an important role in American culture, exposing corruption and wrongdoings in the corporate, medical, and governmental worlds. In it's 28 seasons, 20/20 has covered a huge range of topics and issues, doing so in an in-depth style and different angle than the nightly news, and has become a revered television staple. 20/20 Classics remembers the greatest moments from this long-running series, including Diane Sawyer's investigation of gun violence among children and Stevie Wonder's touching tribute to Michael Jackson.