Harmonic

Harmonic Publisher's Description:
Harmonic always finds the lyrics you want, quickly and easily. You don't have to do a thing. Fire up the widget and play a song from iTunes. Leave it open in Dashboard and each song that plays will have lyrics added to it in the background while you work or play. It's that easy.

iPod integration
If you have an iPod with video or an iPod nano, your lyrics go directly onto the iPod via iTunes. Tap the center button while playing a song to sing along. Have an older iPod? No problem. Just drag the "Harmonic Lyrics" folder from your Music folder into the "Notes" folder on your iPod. Next time you are on the bus and can't figure out that one line, whip to your Extras > Notes > Harmonic Lyrics section on your iPod and experience portably lyrical bliss.

Harmonic is the not only the best looking lyrics widget, it is also the simplest to use. Don't worry about it, it does exactly what you want it to.
What's new in this version:
Lyrics database bug repaired, new pink skin, ability to paste and clear lyrics for all tracks. Note: If version 1.5 added incorrect lyrics to your tracks, this version will replace those automatically. Sorry for the inconvenience.