After teasing with a couple of concept photos, Starship Entertainment has now released the teaser for SISTAR's upcoming single, Shady Girl. Having gone with Push Push for their debut single, the SISTAR girls are back with a brand new concept, Before & After, and they hope their new song will leave an even deeper impression this time around. The MV teaser showcases their transformation from ordinary girls into fashionistas, and also stars Kim Heechul, who will act as a couple with each SISTAR member. Check it out below! SISTAR will kickstart their promotions on the 25th with a showcase. Many thanks to juzix@4hipstar for tip.