Did You Know?
I think the main thing about doing a cover is you feel there's something in the song that suits you and so you then alter the song to make it suit you. If you didn't alter things to suit you then all you're saying is 'my voice has a similar style to the guy that did it 10 years ago so I'm going to copy that' and there's not much to be said about that.
He sang in the choir "Do They Know It's Christmas?" by Band Aid.