As far as pop music goes, 2012 was a year of highs and lows. Adele had another good year with "Skyfall" and the release of the music video for "Set Fire to the Rain," Rihanna ruled the charts with her endlessly catchy "Where Have You Been," and the internet gods were gracious enough to give us Psy and Carly Rae Jepsen. In the middle, Fun. gave the high school graduating class of 2012 several anthems to weep and say goodbye over and the youthful fops of One Direction made it across the pond. As far as lows go, there was a lot of Maroon 5, a lot of Chris Brown and and the internet gods were spiteful enough to give us Psy and Carly Rae Jepsen.

While there are plenty of hits and misses, one thing is for sure: This mashup — which took producer Daniel Kim over 500 hours to make — is thoroughly impressive.

[The Gift of OCPD]