Trial by SongSmith - it's not a classic until it's a SongSmith cover version....

Every tool has it's job to do... and we just found out what SongSmith is for.
THese are, frankly awesome... I can't do justice to the evil genii from Microsoft - or the more benign and thoroughly appreciated genius of http://blog.entertainmentweakly.com/

Here's my absolute favourite:

Classic Hits by Microsoft Songsmith: "Creep" by Radiohead


and also... couldn't resist:

Classic Hits by Microsoft Songsmith: "Roxanne" by The Police