"I Got a Boy"

It took the most beloved of all Korean girl groups (and a handful of Euro writers) to finally deliver a song as sharply plotted and blindingly razzle-dazzle as the K-pop machine itself. Harmonizing, speed rapping, and belting like divas, mostly in Korean, these nine young idols romp through a candy land of pop sounds, from minimal R&B to high-BPM dance. It's a musical gymnastics routine.