LOLYou didn't know that was a cover? God do I feel old.
For me, there is no better or more iconic cover than this, which is a hugely popular song few people know as a cover - http://www.youtube.com/watch?v=6FOUqQt3Kg0
More recently, I like this, ragged, live cover version much more than the original (mainly because I like many Smiths songs but hate Morrissey with a white-hot passion) - http://www.youtube.com/watch?v=LtmS2ePSSdU
LOLWhat a fresh and original idea for a thread.