It’s only fitting that Korea’s attitudinal pop princess was the subject of PSY’s seduction in “Gangnam Style.” Rapper-dancer Kim Hyun-a stands out from the super-clean K-Pop crowd, having controversially left one group (Wonder Girls) and then joining another, electro-pop unit 4Minute, and setting the tone for the more edgy side of K-Pop with songs like “Muzik” and “Hot Issue.” Her solo singles have been even more incendiary—the music video for “Change” was flagged for 19+ viewers for her pelvic thrusting dance moves. “Bubble Pop!,” meanwhile, placed an impressive #9 on SPIN Magazine’s “Best 20 songs of 2011.”