It's been a monumental year for some of our favorite celebrities, and it's time to pick the absolute biggest moment of 2013. Vote in our Biggest Headline of 2013 bracket, a tournament-style competition to rank the biggest story of the year. We've selected 32 big moments, and we need your help to pick the winner. Start by clicking below, and go through the first-round matchups by picking what you think is the biggest headline of the past year. Once you've done that, we'll take your favorites and pair them against each other until there is only one winning headline left. Be sure to check back on Thursday for round two!