K.K. Bossa

"K.K. Bossa" is a slow, light jazzy tune that is played by K.K. Slider in all the games in the to date, based on the Brazilian music genre, bossa nova or simply "bossa". Its album art features the famous "wave" sidewalk design of, and Frank—an eagle based on the Brazilian —appears as well. Blaire, Bree (both as of ), Chai, Cleo (only in ), Deirdre, Elise (both as of ), Goldie, Lulu, Mallary, Margie (before ), Marshall (as of ), Peggy, Robin (before ), Tia (as of ), Wendy (in and ) and Winnie (only in ) all have "K.K. Bossa" playing in their homes.

Lyrics
"K.K. Bossa" is the only song to have been given lyrics—in, it was performed by K.K. Slider at the fireworks festival. Requested by Margie, it quickly becomes her theme song, representing her friendship with the main character, Ai. It was sung in Animalese with a translation running along the bottom of the screen.