First time I heard this was earlier this year from my juniors.
They were singing while moving their fingers and hands and I have no idea what the hell they were doing at the time.
Last month i guess
I saw this kid that I’m tutoring playing this video from youtube over and over again. So it’s actually a world-wide-well-known-kid-song~
And to tell you the truth, the song has been in my head for the whole week for no reason.
Nobody sings it around me.
There are no any sharks in sight.
Guess my brain love the song~