Nice!
It fits with the music and brings the viewer in a happy mood! Good job! Tip: when doing drawing fbf, I recommend you go reverse; draw the whole thing, then erase a bit on every next frame, and when done, reverse the frames. This way, you can draw more accurately, and lines look smoother instead of looking like a caterpillar (what I mean by caterpillar is that we can see that the line is made from many bunches of line)