CHINESE-South Korean rookie boy band EXO released their first mini-album, MAMA, on April 9. EXO has 12 members, all between the ages of 20 and 22. EXO has two groups, EXO-K and EXO-M. One group performs in South Korea and the other performs in China. Their songs express the conflict (冲突) between reality and the digital (数字的) world. Their company is SM Entertainment, which once had the famous boy groups H.O.T and Super Junior.21ST