'Tis the season. No, we're not talking about the holidays—we're talking about the time of the year where every DJ (or DJ wannabe) worth their turntables mixes together an end of the year pop mash-up.

YouTube has always been the playground of those with too much time on their hands. Sometimes the results are wonderous sometimes they are less thrilling. But Daniel Kim's 50-song, eight-minute mashup ...