Most of J-pop chart-topper AKB48's albums and singles come out in multiple versions, with their cheerful brand of pop spread out across different releases. A lot of upbeat bouncers can get lost in the shuffle, which would be a disservice to a prolific outfit who have used all-together-now singing and high-energy beats in playful, and sometimes surprising, ways. This list corrals many of these loose ends for optimal discovery.