Adele show us that it's probably impossible to fix vocals. She has money, she made surgery for her voice and she ended tour because she couldn't sing. There are rummors athat she didn't go on tour again.
And she hasn't played 3000 shows like (band/solo) Jon and she didn't played tour on steroids (SWW/NJ).
I think that Jon works on his voice but there is nothing which can help him for 100%.
This videos are ok for me. I could go on show like this. He sing at the same level like Bono in Chorzów 2009.
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