My siblings and I talk about this all the time and reminisce about the way we used to sing the songs.

Kenny Rogers "Lucille" for me was always "with 400 children and the crocks in the fields."  My brother told me he would leave to with that many children but that it was supposed to be 4 hungry children and the crops in the fields.

Another one is either by Trace Adkins or Tracy Lawrence--It's the song I smell TROUBLE.  Well, I used to sing it (as an adult) as "I spilled tea all over your BLT."

And a Christmas song, "We Three King Eternals"--well, one of my siblings said it wrong and we then all learned the wrong lyrics and for years we were saying, "We three kinky turtles." 

Oh, I had a cousin who never could say satin sheets in the country songs.  He said satin cheese to lie on, satin pillows to cry on.  And in the other song that was supposed to be "Slide off of your satin sheets.  Slip into your long soft mink."  He would replace sheets with cheese.  What was it with him and cheese?

I will add more posts as I recall them because this is a good discussion that will generate some wonderful memories and laughs.