On February 28, Soyu and JungGiGo appeared on KBS 2TV's 'Yoo Hee Yeol's Sketchbook' and talked about how it was different promoting together as a duo than promoting normally with Soyu in SISTAR and JungGiGo by himself or with other male singers.

Yoo Hee Yeol asked JungGiGo, "How is it working with a female singer after working with only male singers?"  JungGiGo said, "It's nice.  My friends are so jealous.  I've been promoting for a long time, but my friends had shown any interest before."

He continued, "Then reports went out that I was working with Soyu and even friends from when I was way younger suddenly texted me.  If it had been very long since you texted someone, you usually start with 'Hey, it's been a while,' or, 'How have you been?' but they just straight-out asked, 'Hey, is SISTAR pretty?'  I got like five of those texts a day."

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Yoo Hee Yeol could completely understand, saying his friends would never ask him about his music but would ask whether he saw Girls' Generation.  He also asked Soyu how promoting in such collaborations was different from promoting with SISTAR.

She said, "It's fun.  I can show an individual color that I can't show in SISTAR."

The duo also performed their hit song "Some" live, so check it out above!