1- The karaoke bar is great, but a full screen karaoke lyrics display would be even better. I'm talking about something like what vanBasco's Karaoke Player
does. It works really well for party settings. With 2 monitors you would be able to show the karaoke full-screen on 1 monitor and the lyrics UI on the 2nd monitor.
2- Make the karaoke bar be a multi-line scroller, with the middle line being the currently playing lyric and highlighted in color.
3- An option to horizontally center the lyric text in the karaoke bar would be cool.