kJams Lite was developed to be a karaoke software jukebox. It's just like iTunes, except there's also karaoke lyrics on the screen (or on the TV) that follow along with the song, showing you what to sing next. Kindof like "follow the bouncing ball".

If you really want to be professional, it can also manage a list of singers and keep track of who is up next! Typically you buy special CDG discs to use for karaoke, which are just like regular CD's except they have graphics in them too, showing you karaoke song lyrics. You put the CDG into your computer and play it, or you can "rip" the songs (ie: import them from the CDG onto the computers's hard drive), then you can play them whenever you want even without the CDG. Supports burning* of mix discs!