I recall he last tried it in Vegas 1975, the song worked but he wasn't feeling too well. 33 years and 364 days ago on August the 19th..
As far as I know he never tried it again later on. On a recording from '77 I heard a fan scream the title, but Elvis was a bit perplexed and didn't do it.
Could be he stopped performing it because it was such an exhausting song to do.