Girl group SISTAR will be making an�official comeback this month, and it's been revealed that member Soyu lost 8 kg for her new image. Representatives of Starship Entertainment revealed, "To prepare for SISTAR's comeback, Soyu has been exercising and dieting for four weeks, which successfully resulted in an 8 kg weight loss. Before, she was rather chubby for a girl group member, but now she's transformed with a toned body." SISTAR will be releasing their first official album on August 9th. Representatives made sure to ask fans to anticipate a more charismatic return. Source + Photos: OSEN