DSKara is a karaoke application for NDS. There are three versions available:

Bet On It – Zac Efron / High School Musical
Wake Me Up When Septembert Ends – Green Day
Work This Out – High School Musical

You need to find the music itself on your own, no one can help you with it.

http://www.dev-fr.org/projets/(nds)-dskara-(v0-7)/msg14692/?topicseen#new