Have you guys seen the "mini lyrics" app for windows? It downloads the lyrics of the currently playing song and displays it on the screen. The great thing about it is that it highlights the current part of the lyrics. Do you know any alternative of it for mac?
I use this. It will display the lyrics and add them to your iTunes library (if you choose to) I would highly recommend it.
There is also LessLyrics. I haven't used it before.
I used to be very happy with the OS X version of minilyrics, but recently, it stopped working on my machine (OS X El Capitan 10.11.2, Itunes 184.108.40.206).
What I really like with minilyrics was the ability of the app to find lyrics for almost every song, including for relatively obscur songs, and for songs in other languages than english.
I've tried Get Lyrical, Lesslyrics, and other options, but I was never satisfied by the breadth of songs these apps could find lyrics for.
This was until I found Singer Song Reader which gives me as much satisfaction (if not more) as minilyrics.