Oh baby I can see the copyright hammers now.
Not possible without Nabi Studios getting permission from the artists to play their music. Meaning to get a list of even 10 different artists would be tons of work and unnecessary work involved with it. That being said, Royalty free music is a possibility.
Though, the "Music" Item allows you to do the same thing, as long as you change the music occasionally. Instead of this, maybe just have a Music folder in the toribash game folder which will take any MP3 and play it. It'd be client side, and as long as nobody records the music and posts it on youtube, you'd be good to go.
Undecided