Rielle Hunter: On The Presidential Campaign Trail Home > Video > 20/20 > 20/20 Reports The Year With Katie Couric: Celebrity Feuds Mariah Carey vs. Nicky Minaj, Chris Brown vs. Drake, and more of 2012's "anger games." The Year With Katie Couric: Celebrity Romance From Jen and Justin to Tom and Katie: the weddings, babies and breakups of 2012. The Year With Katie Couric: Newsmakers Newtown and Sandy topped the list of emotional breaking-news stories of 2012. The Year With Katie Couric: Royals From the skydiving Queen to Prince Charles doing the weather, the royals cut a new image in 2012. The Year With Katie Couric: Guilty Pleasures "Gangnam Style," "Fifty Shades of Grey," "Call Me Maybe" and Honey Boo Boo anyone? The Year With Katie Couric: Politics With Biden's mouth, Ryan's muscles and Romney's hair, 2012 proved politics can be fun. The Year With Katie Couric: 2012 Dishonor Roll Arnold was back, and John Edwards and Lance Armstrong also made headlines for the wrong reasons. The Year With Katie Couric: People We Lost Remembering Whitney Houston, Neil Armstrong and others who left us in 2012. The Year With Katie Couric: Social Media In 2012, if it was worth talking about, it was worth tweeting about (mostly). Tragedy at the Elementary School: What Happened in Newtown, Conn. Part 1: The gunman, the hero teacher and other details of the Sandy Hook Elementary School shooting. Why Did Adam Lanza Snap? Part 2: Shooter was "a little bit different - kind of repressed." Tragedy at the Elementary School: Fallen Teacher's Story Part 3: Teacher Vicki Soto's cousin tells ABC News' Chris Cuomo about her dedication to the end.