Just in time for summer, Rainbow has delivered the "Sunshine" we've all been waiting for (no more rainy days!). While Rainbow has had their share of ups and downs, noticeably downs recently, this single is sure to put them back on top, where they belong. And if the song wasn't catchy enough -- but we assure you, it is -- the video is pure K-pop wonderment. Their last single peaked at #13, but if we were in the betting game, we'd put money on this shooting even higher up on the charts.