[caption id="attachment_340884" align="aligncenter" width="600" caption="So Cool... yet, So Hot"][/caption] Earlier in the month, the pretty ladies of SISTAR unveiled their "So Cool" album and they've been performing very well on the charts. Today, the practice video of their performance for "So Cool" was released by their company, Starship Entertainment. Some of the highest viewed practice videos are from SISTAR and SISTAR19 so this should be a real treat for fans. Check out their sexy moves below!