Sistar heated the stage with their red one-piece dresses.

Sistar performed their song 'So Cool' on 31st broadcast of 2011 KBS Music Festival.

On this day, Sistar performed the opening of 'So Cool' with Clover. Eun Ji Won and Typoon's powerful caught the attention of the crowd. Sister then took the attention of the viewers in their seductive red dresses and kill heels. The skin-toned fabric around their chest area gave an optical illusion.

The powerful stage hand in hand with their sexy outfits shook the hearts of male fans.

Photo Credit: KBS Capture