Recently, it was reported that girl group SISTAR would make their comeback with their second single album, titled, Shady Girl, and a comeback teaser photo of group member Hyorin was revealed. Today, more teaser photos were revealed, but this time with all the members of SISTAR. The teaser photos have a concept of 'Before & After'. In the top photo, the girls are seen with casual clothes, along with their messy hair. In the 'after' photo, below the 'before' photo, the girls have transformed, as their style is now from the 60s. A representative of their agency stated, "On the 25th, SISTAR will release their second single, 'Shady Girl', as well as have their first showcase. Like the concept of 'Before & After', SISTAR will show their new look in their comeback." Stay tuned to the release of SISTAR's Shady Girl!