Go to The Roost cafe in the basement of your museum on Saturday nights between 8:00 p.m. and 12:00 midnight and talk to K.K. Slider. You can have him pick a song for you or you can request a song. These are all of his songs:

Agent K.K.
Aloha K.K.
Cafe K.K.
Comrade K.K.
DJ K.K.
Forest Life
Go K.K. Rider
I Love You
Imperial K.K.
K.K. Aria
K.K. Ballad
K.K. Blues
K.K. Bossa
K.K. Calypso
K.K. Casbah
K.K. Chorale
K.K. Condor
K.K. Country
K.K. Cruisin'
K.K. D & B
K.K. Dirge
K.K. Dixie
K.K. Etude
K.K. Faire
K.K. Folk
K.K. Fusion
K.K. Gumbo
K.K. Jazz
K.K. Lament
K.K. Love Song
K.K. Lullaby
K.K. Mambo
K.K. Marathon
K.K. March
K.K. Metal
K.K. Ragtime
K.K. Rally
K.K. Reggae
K.K. Rock
K.K. Rockabilly
K.K. Safari
K.K. Salsa
K.K. Samba
K.K. Ska
K.K. Song
K.K. Soul
K.K. Steppe
K.K. Swing
K.K. Tango
K.K. Technopop
K.K. Waltz
K.K. Western
King K.K.
Lucky K.K.
Marine Song 2001
Mountain Song
Mr. K.K.
My Place
Neapolitan
Only Me
Pondering
Rockin' K.K.
Senor K.K.
Soulful K.K.
Steep Hill
Surfin' K.K.
The K. Funk
To the Edge
Two Days Ago