OK, a few more extremely reductive choices (based on UK single release dates) from each year. And as before, I'm trying to only use artists once.

2010 - Katy Perry - Firework

2011 - Rihanna featuring Calvin Harris - We Found Love

2012 - Gotye featuring Kimbra - Someone That I Used to Know

2013 - Lana Del Ray - Young and Beautiful

2014 - Mark Ronson featuring Bruno Mars - Uptown Funk

2015 - Years & Years - King

2015 - Florence & the Machine - Wish That You Were Here