2.
One Direction - What Makes You Beautiful
One Direction is the only comeback boy band that gets it. "What Makes You Beautiful" is a fucking great pop song - it's catchy, it has stupidly sweet lyrics, and each guy in the band actually can sing (at least in this song) and putting it all together just makes for one of the funnest songs of the year. It's paper thin and hearing that opening chord makes every pre-teen girl in a 20 mile radius emit an ear-piercing scream, but it's GREAT.