I posted a few back on the first page if this magnificent thread but I just remembered another favorite, Nouvelle Vague's cover of Billy Idol's Dancing With Myself. Wildly different in style, it actually made me understand and appreciate Billy's version more than I had previously. Hearing it was an epiphany; I had the feeling that they had channeled Billy's soul and recorded the version that he would have done if he had been free to let it all hang out and release his inner lounge lizard.