Musk Mystery Cache

There is nothing to find at the posted coordinates.

Having enjoyed solving some "One Better Substitution" puzzles by dvd_wllms and with his permission, I have created my own.   The most recent one is One Better Substitution [4].   This one is music themed.  I could have called it One Better Substitution [5] but decided to break with the naming scheme.  

As with the other "One Better Substitution" caches, your task is to change one letter.   In this case, it is to change a well-known* song (by a well-known artist) to match my clues below.   When you change a letter, the letter that you have changed to is the "special letter".  There are 26 songs, and for each, you will have 1 letter.    

Then total up the number of occurrences of those special letters.   If the letter A occurs twice, then A=2.

As there are so many songs in existence I have narrowed it down by telling you the name of the band/artist in bold green.   Sometimes I give you the band name, and sometimes a partial name or clue.    If you are colour blind or reading this in black and white, it is simply the subject of all these phrases.   The songs are all broadly in the "rock" genre, and from the 50's to the end of the 90s.   Though one song from the past returned to the charts in 2022 (stranger things have happened).   They are all simply songs I thought of.  The fact that they are all pre-2000 sadly reflects my age bias.  

(Any text in parentheses) refers to the lyrics of the song as an extra hint.  

Here's an example:   

Fleetwood Mac are ahead of their time singing about the CEO of Tesla.  

The answer is of course, "Musk"  [Tusk].   So the special letter is "M".  

The original Tusk Video

There is a certitude checker for each song ("Check" link on each line).   Enter the word which is changed (the changed version).   As a bonus, you will see the "substitute" record sleeve if you are correct.  I have added the number of times streamed on Spotify (in millions) just for interest. 

1. Kansans have dirty thoughts  Check 1    541m streams
2. Kate takes advantage of an open bar tab  Check 2  913m streams
3. Bruce was destined to become a massage therapist  Check 3  288m streams
4. Electric Australian bargain takeaway receives a poor hygiene rating   Check 4   275m streams
5. Her Majesty reduces your paycheck  Check 5    1007m streams
6. Mick and Keith tell a tale of fallen rodents  Check 6   67m streams
7. Nudes Ladies buy the last vegetable from a Welsh Tesco   Check 7   213m streams
8. Morrisey wonders when the cattle will arrive  Check 8   202m streams
9. Bostonians provide not only the rind of the orange  Check 9  643m streams
10. Who would allow a reptile into an amusement arcade?  Check 10  172m streams
11. Kiwis advise against putting the jam on the scone first  Check 11   415m streams
12. Wailing Bob laments the loss of someone to cook breakfast  Check 12  266m streams
13. Elton wears cargo pants  Check 13   845m streams
14. Iggy is stuck with having a large chest  Check 14   133m streams
15. Bob D is knotted in adhesive   Check 15   84m streams
16. Tom P acts like a lumberjack  Check 16   545m streams
17. B-52s sing about a rundown building for birds with a cooing voice   Check 17   190m streams
18. Eurythmics imagine Elon’s social site   Check 18  1008m streams
19. Aerosmith applies suntan lotion   Check 19   805m streams
20. Chrissie H sings about the shiny bit of a spacecraft  Check 20  153m streams
21. Go-Go's  extra money from waitressing is locked up for safety   Check 21  49m streams
22. Velvet Underground are killing time until the movers come   Check 22   45m streams
23. Beatles tale of Scandinavian knitwear   Check 23    144m streams
24. Zeppelin are disappointed that the air freshener didn’t work   Check 24   32m streams
25. Fleetwood Mac   (warn about being careful with) a piece of furniture   Check 25   817m streams
26. Elvis (1956) is hoping for a decent breakfast   Check 26  120m streams

The cache can be found at       N 51 23.abc  W 002 22.xyz

Where the capital letters represent the number of occurrences of that letter as "special", then do the sums below.

a= B+C+E+V

b=H+I+P+R

c=J+O+M+T+V

x=N+S+V

y=F+G+L

z=K+U+V

Cache hint in Certitude.

*My intent was to use well-known songs and artists, and this is broadly true.    But my view of "well known" is impacted by my heritage as well as age.  For example, #1 was a hit song in the USA, reaching #6 single in the US charts (with the album reaching #4).   However, the song did not make the UK charts.    And to be more "modern" I've added streaming data (and song #1 has over 500 million streams).  

Two of the tracks have over 1 billion** streams.   For context, the current most streamed song in the world is "Blinding Lights" by  The Weeknd with 3,452 Million streams (3.452 billion) (as of 9 March 2023).  You can see the latest statistics here  List of most-streamed songs on Spotify

**In official UK statistics the term is now used to denote 1 thousand million – 1,000,000,000. Historically, however, in the UK the term billion meant 1 million million – 1,000,000,000,000 - but in the United States the term was used to refer to 1 thousand million.

You can validate your puzzle solution with certitude.