The fifth year of DJ Earworm's "United State of Pop" mashup of the 25 biggest selling Billboard songs of the year. He added some other songs this year though (We Found Love & Sexy And I Know It, possibly others I'm not 100% sure) to make it more current or something, idk check his website.
I love it, but it's still not as good as 2009. Much better than last years, that was pretty poor.