Wouldn't you know it? I thought it was a little early for end-of-the-year music mashups when I posted Daniel Kim's Pop Danthology. And not five minutes after it published, I found out that DJ Earworm has his annual United State of Pop mashup ready for 2013! Oh well, this way you can listen to both and see which one tickles your fancy the most.
United State of Pop 2013 (Living the Fantasy) contains the top 25 songs of 2013. A list of the songs used can be found at the YouTube page, and you can buy the download at Legitmix. -via Metafilter