Never underestimate those new groups just because they're fresh faced, wide-eyed and a seemingly naive set of idols. Girl group SISTAR manages to once again impress the crowd with their performance of their debut single Push Push on today's Inkigayo. It's only a matter of time before these girls become a household name! Check out their performance below! http://www.youtube.com/watch?v=F22WdgsvG9A