I'm 52 now and in the thick of The Great Mental Pause!!
My singing voice has dropped - but over at least the last 5-7 years. I think it's better, more fuller, but I haven't got the same flexibility as I had - for ornamentation e.g., but, that could also be coz I don't use it as much as I used to!!
The Hot Flushes (sorry, Power Surges!) are still a bugga - despite taking Remifemin - and the heat comes from the IN side, so fans etc are only a slight help, but, most people seem to understand what's happening to me and make sympathetic jokes!! And I'm damned if I'll give up eating curries and garlic and ginger and good things like that!!!
I do get distraught around period time (much more than when I actually HAD them!!!) and Life gets on top of me for a few days, then it clears and I wonder : what the hell THAT was all about!!!

One of the worst aspects is, I think, loss of memory - esp. for SONG words - that is a REAL BASTARD - I've lost confidence in performing without words now, which changes your whole performance and delivery of a song.

We won't even mention the weight gain thing though ...
HOW many years does this Change last?????????

Cheers!
R-J