Yes, Elvis Presley would have been 79 today had he not died in August 1977. To commemorate Mr. Graceland, here is an emotional performance, just six weeks before his death.
There are a few versions of this performance online, including one where the background instruments are a lot louder, but this version, which isolates his vocals and somewhat sporadic piano playing, tugs on ye olde heartstrings just that much more.
Oh, and if you think Elvis looks in rough shape here, take a look at what he would look like now, according to age progression software. By the way, we're not inserting the Elvis photo into this story because the software did kind of a lousy job with his face. He looks like he's related to Sloth from Goonies.