18. Girls' Generation 'Girls' Generation' This nine-member, all-girl K-Pop drill team fully exploits South Korea's 800-pound neighboring market with a Japanese-language album (plus English choruses!). And though it may be a translation trainwreck, these chipper, reality-show vets behave with real zeal — eagerly beaming, winking, chattering, emoting when it's called for — over terrifyingly sophisticated dance tracks (echoes of Latin Freestyle, Italo disco, every Backstreet/Britney scrap from 1999), plus a dutifully aching ballad or two. The peak is "Run Devil Run," a white swan/black swan kiss-off with a chorus so confidently sassy it could stop a North Korean missile in mid-air. (CHARLES AARON)  

6. 2NE1 2nd Mini Album The TLC of K-Pop dropped this stopgap, six-song EP compilation in July, and for pure (purely impure?) sonics, it might be the year's most boldly thrilling recorded statement. A collision of electro-house, hip-hop, and pop-rock guitar, with yet another undeniable hook cropping up every 15 seconds, it is the primary work of producers Teddy Park (formerly of Korean-American rap group 1TYM) and Kush. But this all-female foursome clearly own their persona more than most K-Poppers, particularly on the spicy, playalistic "I Am the Best" and the body-image throwdown, "Ugly." There's even a solo turn by the group's vocal powerhouse Park Bom, who considers the cosmos over a springy sprint to a piano-plinking chorus. (C.A.)