K.K. Fusion
From Nookipedia, the Animal Crossing wiki
K.K. Fusion is a K.K. Slider song that has a dark beginning, then turns over to the synthesizing melody. It is electronic mostly, using no acoustic instruments. It uses synthesizers, electronic drums, and electric-slapped bass. Butch, Zoe, Cherry, Maddie, Pancetti, and Sally play this song in their houses if they have a stereo. Peewee, Cherry, and Lopez appear on the album along with K.K. Slider.