K.K. Jazz
From Nookipedia, the Animal Crossing wiki
K.K. Jazz is a lively, quick-paced song sung by K.K. Slider. It has a brushes drum set, a synthesizer, a walking upright bass, and a picked electric guitar. It makes you feel like you are in a downtown plaza mall quickly trying to snatch some hot sales on clothes, in the 70s or 80s, of course. Blaire, Curt, Pompom, Eloise, Meow, and Huck play this song in their houses if they have a stereo.