The group then returned in July 2011 with the release of their first full-length studio album A Class with the title track "Good Bye Baby".
The group held their goodbye stage in early September after finding great success with their album and title track.
In 2009, she auditioned for Mnet Superstar K and made it through the preliminary round but she was ultimately eliminated.
However, she caught the attention of a scout from JYP Entertainment and soon became a trainee.
The group released a song used for the commercial called "Love Again" for the Samsung Beat Festival.
The song was written by Korean composer Super Changddai, and the music video was directed by Hong Won-ki.
The title track was composed by famous composer duo, E-Tribe.