Perhaps it’s the contraction form of “Go-Goes?”
Seriously, I’m a big fan and I have no idea. I’ve tended to think that the band members saw the possessive form and thought of it as the plural form also…which is basically the subject of this whole thread. Besides, “Go-Gos” is sort of odd-looking.
That’s the best theory I’ve heard yet.
“Doctor’s appointment” has always bugged me. I say “doctor appointment.”
@CardboardBoxx You do realize if it’s plural, it’s drivers’ license (with the apostrophe at the end). (Also, sorry, but I do spell license the American way, you realize.) 
But it isn’t plural. In Illinois at least (and I suspect elsewhere), it’s DRIVER’S LICENSE. One license per driver.
Cannon, cannons is another one. I was recently reading a book where cannons was used as a plural. The worst part was when they misquoted Tennyson - "cannons to the left of them, cannons to the right…" Grrrr.
Sorry, what is the problem here? Is this one of those British/American differences again? Because Merriam-Webster says cannon can by pluralized with either cannons or cannon. I’m not sure I’ve ever hear the singular use for the plural in American usage.
This is correct. But in The Charge of the Light Brigade, Tennyson wrote ‘cannon’, not ‘cannons’. So while the usage is correct, the supposed quote is wrong.
Many stores had “Penneys” signs on them.
The medical facility founded by Danny Thomas is St. Jude Children’s Research Hospital, not St. Jude’s.
St. John Arena, longtime home of The Ohio State University’s men’s basketball team, was named after the Buckeyes’ former coach, Mr. Lynn St. John. He never owned the building, though, so “St. John’s Arena” is incorrect.
Here is an uncommon word that is incorrectly singularized : lithops
I grow them and they are such a joy to have.
cyclops, congeries, litotes, lens…
many words end in “s” that are already singular, but your post is interesting—do people really often incorrectly singularize them?
The extent of my knowledge is limited to a Facebook gardening group dedicated to these plants. New members often buy one Lithops and call it a Lithop. It happens to be a pet peeve of the moderators in that group
Species is one of those words that it singular and plural. Sometimes people improperly use the spelling specie as the singular. Specie is a whole other word meaning money in the form of coins.
I’ve mini-ranted about my mom’s “possessivization” of almost every store name. She goes to Nordstrom’s and Barnes & Noble’s (shudder).
The frustrating part of this is that if you correct her, she doesn’t care. And basically says “I live in my own world where I can use language any way I want to, and go to Nordstrom’s… or Mack-a-NACK Island!” (we asked her to please say Mack-i-NAW decades ago, and she still uses that example)
And I think everyone in her retirement home, if their medical condition is really serious, gets sent to Mayo’s! (the Mayo Clinic).
Here is a plural pronunciation peeve.
Some words are pluralized by the suffix -ae. Larvae, antennae, vertebrae, algae, etc.
All my biology profs back in college were adamant that -ae is pronounced "ee’’ as in keep or deep.
Dictionaries agree.
I recently saw a list of tips for how to do something, divided into two groups. It was labeled:
DO’s and DON’Ts
One of them has to be wrong.
We do need to be careful to not be snobbish about this. A Twit of FB pst is different to a printed instruction or a sign.
"TRESPASSER’S WILL BE SHOT" is out of order, but while “My car wont start” is wrong, it doesn’t really matter.
agree
I’ve seen this so many times that it seems to be standard. There has to be a better way.