I've always been a huge fan of DJ Earworm's "United States of Pop" year end mash-ups, but he's got some competition now! 

Daniel Kim has actually been putting his "Danthology" together for the past few years, but gained the most notoriety after his went viral along with Earworm's and YouTube's year in review mixes.  The Pop Danthology 2014 is probably my favorite one for this year.

How does it stack against it's competition?

DJ Earworm's United States Of Pop 2014: Do What You Wanna Do

YouTube Rewind 2014: Turn Down For 2014