Heart Shaker has secured its #1 spot on all the music streaming sites (it went down on Melon a few times but essentially remained number one for the most time after release) meaning its hit a real time all-kill Heart Shaker achieved it's first Roof-hit on MelOn not too long ago! Hanteo would most likely release the data on the number of albums [Merry & Happy] sold later. And people say Twice is on the decline just because they couldn't make another national hit as if having TWO national hits isn't more than enough in one's entire career. Congrats girlies! Your hard work will always be worth it!