SISTAR, "Reunion" after a long time.

* Called as the "Queen of summer song", considering their work on the big-hit songs such as "Shake It" which was released in the summer, and seven years of activity.

* The group dissolved just after their activity in May this year

* As a "Queen", they continued to keep the 1st place until their last song.

* Hyoolin became independent from the management office and thus their ”Restart" has become difficult to be materialized.