Im sorry if im a bit behind but im just tellin sum people who dont know but if you wanna listen to music on ya Wii you do dis:
Insert SD Card
Go Onto Photo Channel
Click The Slideshow Button Then Press A When The Countdown Starts
Click on settings
then click on music
click on the song u want to listen to and there you have it
P.S you have to have at least 1 photo on SD card and the Wii can only show 100 songs!
Hope you enjoy!