So I thought I'd make a thread celebrating singers who've managed to remain very consistent with their singing over time, with some examples of performances. Obviously, they don't have to be exactly the same (lowering the key down a semitone or two seems reasonable), but the closer to the original performance, the better! (Bonus points for performances more than 25 years apart).
Here's a version performed for Muhammad Ali's 50th birthday in 1992. 36 years after the original album recording and still a near flawless performance. Richard was 60 here. youtu.be/AK_jm3Hz1Wk?t=1m6s
Here he is in 50 years later in 2008. Whilst not identical, and not with quite the stamina to sing all of the original notes, he's still sustaining falsetto G5s and belting out B♭4s at the age of 76. youtu.be/xWXz-FSq8dg?t=4m39s