Below is a link to a solo performance of the great Italian tenor Luciano Pavarotti in Moscow in 1964 when he was 29.
I saw Pavarotti many years later in New York. He wasn’t the greatest tenor ever, that could have belonged to several others but when he was young his voice was powerful and when he got old and had many health problems he was still able to perform oh and he was an amazing actor as well.
I used to go to the Metropolitan opera alone and picked up an extra ticket at the door. There was always someone who had an extra ticket.