BOB was done in a lower Key when they played it on SNL due to Mick's laryngitis.

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yeababyyea
Two examples of the Stones accidentally playing songs in wrong keys:

Tumbling Dice (Landover 2002): [youtu.be]

Sympathy For The Devil (Toronto 2002): [youtu.be]

I think Mick sounded pretty good on Tumbling Dice.

As I'm a sax player as well as guitar player, what really impresses me are the brass section that by the flick of the finger CONVERTS their notes on Dice to a step lower, ie A!

That must've been tricky!!! Much easier to do it piano or guitar-wise.