K.K. Soul

"K.K. Soul" is a K.K. Slider song. It resembles southern soul music with its prominent horns. Merry appears on the album cover next to K.K. Slider. Alli (as of ), Bangle (beginning as of ), Bea (in ), Celia (as of ), Chadder, Daisy (before ), Eloise (as of ), Henry, Mint (beginning as of ), Pate, Pompom (both as of ), Sandy (beginning as of ), Whitney, and Willow (both as of ) will play this song in their homes.

On the album Nintendo Sound Selection Vol. 3 - Luigi B-Sides, there is an official remix of "K.K. Soul" arranged by Toru Minegishi, who also composed the original song. It uses the vocals of the live version and the instrumentation (drumkit, horns, electric bass, electric piano, clean electric guitar, and vibraphone) of the aircheck version. The overall length of the song is extended, and it ends with an extended vibraphone solo.