Sometimes I sit in the hallowed halls of my music library here at "the Smithsonian" and wonder "what if?" One recent interesting thought: What songs would be in Elvis' concert set-list today?

Mmmmm ... what if? Hey, Elvis loved to shake things up. We all know that Elvis passed away Aug. 16,1977, just a few months after the March 21, 1977, release of AC/DC’s landmark album, "Let There Be Rock."

Now if only he had lived longer, maybe we could have heard Elvis bring down the house with this!

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