I think the mash-up is fantastic.
But 2011 is honestly the worst year for music ever.
And he didn't include Down On Me, Look At Me Now or What's My Name?, which were in the top 25.
But he included Till the World Ends, We Found Love and Sexy and I Know It, which weren't in the top 25.
It's quite obvious DJ Earworm likes dance music and hates RnB/hip hop lol.