I don't think that anyone should whinge about what I call regional rhymes. Rhyming mirror with beer would be terrible if I did it, but if it was a song from say Kentucky or Tennessee, it would probably be a genuine rhyme. You'd prbably get away with rhyming squirrel with girl too.
In "I want to hold your hand", the Beatles rhyme "I think it's only fair" with "apologise to her". That is a true rhyme in Liverpool to this day.
In my own house, my wife Wendy could rhyme book with spook, where coming from the opposite side of the Pennines, I would rhyme book with luck.
I add my disdain for Neil Diamond's "brang", and as an example of the way in which perfect rhyming can be destructive and unintentionally comic, Billy Braggs lines go:-
"I've always heard it said that love is based on understanding,
Until that's true you'll find your stuff all stacked out on the landing "
(Actually it might not be entirely unintentional here)
Cheers
Dave