Rico, outstanding job with this one, too. I assume you recorded the song first, then sang along with it while it played on the keyboard - at least that's the way it appears.
Paul and others that may want to add this one to their repertoire, I have an Elvis Shuffle style for Yamaha arranger keyboards that fits this, and several other Elvis songs quite well. It was given to me by an old friend in Florida who used to frequent this and other arranger keyboard forums, Charlie (Rattley) Ohram. Here's a link to the file
Elvis Shuffle Enjoy,
Gary
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K+E=W (Knowledge Plus Experience = Wisdom.)