That’s one of the problems in referring to lyrics for examples of English usage. You need to understand when, where and how the usage might be acceptable. You also hear words in traditional Christmas Carols which are no longer used in standard English.
If someone wants to learn Jamaican English, that’s one thing. But Tamara wasn’t referring to that as far as I could see.
I’m sure that native English speakers occasionally make unintentional errors (for example, they’re thinking of using the uncountable word stuff, but the countable word things accidentally comes out of their mouths instead).
Or occasionally a native speaker may intentionally want to say something incorrectly, for “shock effect”, for example.
Shakespeare also wrote things that would not be used by 99.9% of native speakers of English today. :lol:
For me, the correct usage of much and many is not problematic or difficult in standard British English, American English, Canadian English or Australian English. If someone uses much or many incorrectly, that person runs a very high risk of simply sounding stupid or uneducated — even in an informal situation.
If, however, a person were to determine with 100% certainty that using much with countable nouns was acceptable and standard in the place where they were living and/or working, then the usage might be seen as “safe”.
However, it would be extremely negligent on my part (as an English teacher) to tell someone it’s OK to say “too much things”.