actually, they do sing, it look me time to figure it out, but the 4 main dancers sing in the chorus and in the bridge, bạn can hear a very distinct voice from them. in the first chorus bạn hear sooyoung, in the một giây chorus bạn hear sooyoung and yuri, in the bridge bạn hear sooyoung, yuri, yoona and hyo, and in the third chorus bạn hear hyo again.
I NEED A TIME MACHINE~~ i'm a ballad lover, hehe.. this song is perfect.. i tình yêu it soooo much.. i heard that it was about -1C when yoona's cry scene.. yoona's acting.. JJANG!!