Confusing song lyrics

(Chapter 8 Confused in my book)

Recently, I've noticed that sometimes I can't listen to a song if more than one person is singing the same words, but at a different time. It gets too confusing for me to even listen to, even though I really love music! I think that one of the problems could be that I love singing along to the tunes that I hear and this is difficult, if not impossible for me to sing along to a song in this format. I don't think that when I was younger and didn't have a memory impairment that this was a problem for me.