헤이걸스(HEYGIRLS) - '유후후 (YOO-HOO-HOO)' MV
"Yoo-hoo-hoo" is the fourth (sixth overall) digital single by HeyGirls. It was released on October 30, 2018. The song is a remake of the group's previous single "Nog-Yeojwo", which was released on July 16, 2018.