Wonder Girls is a South Korean girl group formed in 2006. After the members were trained for long time, the group debuted in 2007 with the first single <i>The Wonder Begins</i>. However, the group had to have a hard time at the beginning of their career because one of group members, Hyuna, withdrew the group due to her illness and other member, Sohee, got injured on her knee. The group scouted a new rapper Yubin and released the first album <i>The Wonder Years</i> on September of the year. The title song of the album "Tell Me" was a real hit which made the group jump to stardom. Apart from "Tell Me," Wonder Girls made many great hits such as "So Hot," "2 Different Tears," "Like this" and "Like Money." The group's most hit "Nobody" once ranked 76th on Billboard Chart in 2009.
