You can’t spell K-pop without Girl’s Generation (SNSD). Alongside SHINee, they put K-pop on the map for everyone to enjoy.
Well, the Girls who defined an entire Generation are back with a kick-ass MV:
https://www.youtube.com/watch?v=SdzLl-XpJt0&index=2&list=FLhy80COEAysN2sP806Eu0jQ&t=0s
Also, please make sure to check-out this awesomely 3D MV featuring the lovely Yoona-shi: