Okay, first of all and most importantly ( :D )maybe I shouldn't have said "different versions" of the song. Yes, I was thinking of Rod Stewart among others, but his was a totally different song with the same name. Lauran Branigan did her version of the Alphaville one. As for "anthems of our teens," sure if I had gone through a time machine first. Wrong decade. (sighs and shakes head) You young people today... :p
@ZeeGee - LOL! at "plumbobs in the song ," yes I guess there are. :D
With that out of the way...it's often difficult to know exactly which way to go when sims are age stuck and Overwatch does not resolve the issue on its own because we need to know the cause before we can say for sure what the solution will be. Certainly if we fiddle with the age stage lengths in game options, sims already in the game will suddenly become overdue for aging up and they should catch up eventually (courtesy of OW). If you make really drastic changes to the extent that everyone in the world should suddenly be an elder or have died from old age, the game could theoretically lock up on you as there would be far too many age-ups to process all at once, but from all reports these seem to be fairly rare occurrences.
When I encounter an age stuck sim that OW is not taking care of within let's say 2 sim days of their birthday, I take a very firm approach and set about fixing them because I don't want age-up related errors plaguing my game. If they are homeless NPC Role or Service Sim, I might do the reverse and lower their age at least temporarily using MC so that they are back in their assigned age stage again until I figure out what to do with them. Or I might TA them if I have no idea who they were to begin with and I find them standing on the sidewalk in some sort of catatonic state, causing my game to lag, as they keep getting pushed to staff their cash register or whatever but can't.
For residents, then comes the let's try to change all of their outfits strategy. Possibly with a DebugEnabler Fix Invisible Sims command first, even if they aren't "invisible" that one will attempt to fix bad outfit assignments, the actual assignments being bad, not the clothes themselves.
When absolutely all else fails, I have brought sims into CAS and changed their age stage from in there. We aren't supposed to do that. It can damage the sim, and if going from toddler to child or child to teen I think we've all seen occasional malformed sims where their heads do not fit their bodies or something like that. But sometimes that works out well for me and seems better than replacing the sim with a whole new one entirely from within CAS.
Sorry, I wish we had a "Fix Me" button for when this happens but there are too many possible causes for that to be practical.