Between work and Wimbledon, I think my sister is fully occupied at the moment so may not be around to respond to this. I'm guessing this is a reference to a Neil Diamond concert. She has, of course, paid to see the chap sing live on many occasions but I have the feeling she has decided that enough is enough. I'm led to believe his vocal cords now produce a less-than-Sweet Caroline and she prefers to remember him as he was at his peak. To find out when that was, you'd have to ask her.
Talking about Neil Diamond, I watched an old episode of "The Big Bang Theory" recently where Howard and Amy bond by singing some of his songs on a car journey. Very funny.