AKB48, the most popular idol group in Japan at the moment, will be singing the ending theme for anime series Dragon Ball Kai.
AKB48 has around 48 members (sometimes it is slightly lower or higher depending on how many members have left or "graduated") split into three teams: A Team, K Team and B Team. The group hit number one on the pop charts last fall with its single "River". Earlier this year, the group's newest single "Sakura no Shiori" hit number one as well.
(Cool for gamers: Last spring, members of AKB48 even cosplayed as Chun-Li at the premiere of Street Fighter: The Legend of Chun-Li!)