"The Year With Katie Couric" - a collaboration between "20/20? and People magazine - reviewed all of 2012, from the biggest news stories like Newtown and Sandy to guilty pleasures like "Gangnam Style" and "Call Me Maybe." Celebrity marriage, breakups and babies - and feuds - also made appearances. Social media's effect on politics and pop culture was another focus.
Watch all these stories and more by clicking on the videos below.
Celebrity Romance - Jennifer Aniston and Justin Theroux got engaged; Tom and Katie split; Jessica Simpson had a baby. Here, the weddings, babies and breakups of 2012.
Dishonor Roll - John Edwards, Lance Armstrong and David Petraeus made headlines for all the wrong reasons. Celebrities who appeared in mugshots, not vanity shots, included Shaun White and Lindsay Lohan.
Social Media - In 2012, if it was worth talking about, it was worth tweeting about (mostly).
Guilty Pleasures - "Gangnam Style," "Fifty Shades of Grey," "Call Me Maybe" and Honey Boo Boo were on everyone's minds, lips and screens in 2012.
Newsmakers - Newtown and Sandy topped the list of emotional breaking-news stories of 2012.
The Year in Royals - From the skydiving Queen to Prince Charles doing the weather, the royals cut a new image in 2012.
Feuds - Mariah Carey vs. Nicky Minaj, Chris Brown vs. Drake, and Michael Bloomberg vs. soda.
The Year in Politics - With Biden's mouth, Ryan's muscles and Romney's hair, 2012 proved politics can be fun.
People We Lost - Remembering Whitney Houston, Neil Armstrong and others who left us in 2012.