Over 40 Xbox Live apps rolling out from now until Spring, Napster & Karaoke launch today

[Lostplanet22]

Karaoke one is pretty good :).

you can play it with your head set and they make 5 songs free every day.

Sadly you can't really buy songs but for a small fee you can rent all 8000-9000 songs for a couple hours to 24 hours.. Pretty good for a saturday evening :).