Rhys from Awesome Games writes: 'As gamers, we’re so used to our music being bereft of any sort of vocal accompaniment, other than a tune to hum, that it can come as a surreal surprise when a track actually features someone’s voice. And no, we’re not talking about the epic choir chants reserved for JRPG final bosses, either.
'But just like in real life, lyrics can a make song better or worse, and many inherently soundtracks are suffer because of this. However, when a composer intentionally adds lyrics to a song in the knowledge that it will make the game that much better, then what you end up with is a winning, memorable formula. Below are ten of the catchiest songs in video games that feature vocal talent.'
Gitaroo Man songs are also worth a mention ;)
http://youtu.be/iThvfax4w8o
ROLLING AROUND AT THE SPEED OF SOUND!