Tune Buddy Lite
Tune Buddy Lite Description:
Tune Buddy Lite displays the current playing track in the menu bar and provides basic playback controls.
Tune Buddy integrates itself into the menu bar, taking no desktop space, no dock icons.
Also check out the "Tune Buddy" app which offers additional features like Spotify Support and a built in Last.fm Scrobbler!
System Requirements: Mac OS X 10.6.6 or later
Operating System Support: Mac OS X