Previously, SISTAR has released a teaser video of their latest song 'Alone' featuring lead singer SISTAR, Hyorin through Youtube account and the official Facebook page SISTAR.

Mini album teaser SISTAR with hits single 'Alone', will be released on April 12, 2012.
In this teaser, the figure of a beautiful and glamorous Hyorin is emphasized. Despite the tight dress looks glamorous and sparkling accessories, facial expressions Hyorin look if you're feeling lonely.